diff --git a/.nojekyll b/.nojekyll
index a6e16ff..f2d7d67 100644
--- a/.nojekyll
+++ b/.nojekyll
@@ -1 +1 @@
-b292ad9d
\ No newline at end of file
+2922d7a6
\ No newline at end of file
diff --git a/CHANGELOG.html b/CHANGELOG.html
index ff8c8c2..65710b9 100644
--- a/CHANGELOG.html
+++ b/CHANGELOG.html
@@ -125,7 +125,7 @@ <h2 id="toc-title">On this page</h2>
   <ul>
   <li><a href="#changelog-for-svgling" id="toc-changelog-for-svgling" class="nav-link active" data-scroll-target="#changelog-for-svgling">Changelog for <code>svgling</code></a>
   <ul class="collapse">
-  <li><a href="#unreleased" id="toc-unreleased" class="nav-link" data-scroll-target="#unreleased">Unreleased</a></li>
+  <li><a href="#node-styling-and-compatibility---2024-08.20" id="toc-node-styling-and-compatibility---2024-08.20" class="nav-link" data-scroll-target="#node-styling-and-compatibility---2024-08.20">[0.5.0] - Node styling and compatibility - 2024-08.20</a></li>
   <li><a href="#node-styling-and-compatibility---2023-09-25" id="toc-node-styling-and-compatibility---2023-09-25" class="nav-link" data-scroll-target="#node-styling-and-compatibility---2023-09-25">[0.4.0] - Node styling and compatibility - 2023-09-25</a></li>
   <li><a href="#inkscape-compatibility---2021-10-11" id="toc-inkscape-compatibility---2021-10-11" class="nav-link" data-scroll-target="#inkscape-compatibility---2021-10-11">[0.3.1] - Inkscape compatibility - 2021-10-11</a></li>
   <li><a href="#hybrid-htmlsvg-tree-drawing---2018-12-10" id="toc-hybrid-htmlsvg-tree-drawing---2018-12-10" class="nav-link" data-scroll-target="#hybrid-htmlsvg-tree-drawing---2018-12-10">[0.3.0] - Hybrid HTML/SVG tree drawing - 2018-12-10</a></li>
@@ -143,8 +143,8 @@ <h2 id="toc-title">On this page</h2>
 
 <section id="changelog-for-svgling" class="level1">
 <h1>Changelog for <code>svgling</code></h1>
-<section id="unreleased" class="level2">
-<h2 class="anchored" data-anchor-id="unreleased">Unreleased</h2>
+<section id="node-styling-and-compatibility---2024-08.20" class="level2">
+<h2 class="anchored" data-anchor-id="node-styling-and-compatibility---2024-08.20">[0.5.0] - Node styling and compatibility - 2024-08.20</h2>
 <p>This version is intended to be the last release that is marked as a beta / pre-1.0 version.</p>
 <p>New features:</p>
 <ul>
diff --git a/gallery.html b/gallery.html
index 87fcb4b..10479c3 100644
--- a/gallery.html
+++ b/gallery.html
@@ -7,7 +7,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
 
 <meta name="author" content="Kyle Rawlins">
-<meta name="dcterms.date" content="2023-11-11">
+<meta name="dcterms.date" content="2024-08-20">
 
 <title>svgling - svgling diagram gallery</title>
 <style>
@@ -199,7 +199,7 @@ <h1 class="title"><code>svgling</code> diagram gallery</h1>
     <div>
     <div class="quarto-title-meta-heading">Published</div>
     <div class="quarto-title-meta-contents">
-      <p class="date">November 11, 2023</p>
+      <p class="date">August 20, 2024</p>
     </div>
   </div>
   
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index de475dd..14354d2 100644
--- a/gallery_files/figure-html/cell-5-output-1.svg
+++ b/gallery_files/figure-html/cell-5-output-1.svg
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\ No newline at end of file
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diff --git a/gallery_files/figure-html/cell-6-output-1.svg b/gallery_files/figure-html/cell-6-output-1.svg
index 89bb73b..bae624d 100644
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+++ b/gallery_files/figure-html/cell-6-output-1.svg
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\ No newline at end of file
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/></svg><line stroke="black" x1="50%" x2="47.9906%" y1="23.2px" y2="48px" /><svg width="4.01875%" x="95.9812%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">.</text></svg></svg><line stroke="black" x1="50%" x2="97.9906%" y1="23.2px" y2="48px" /></svg>
\ No newline at end of file
diff --git a/index.html b/index.html
index 25c5c62..ba4858b 100644
--- a/index.html
+++ b/index.html
@@ -7,9 +7,9 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
 
 <meta name="author" content="Kyle Rawlins">
-<meta name="dcterms.date" content="2023-10-07">
+<meta name="dcterms.date" content="2024-08-20">
 
-<title>svgling - The svgling package</title>
+<title>svgling - The svgling package: Linguistic tree diagrams in python + SVG</title>
 <style>
 code{white-space: pre-wrap;}
 span.smallcaps{font-variant: small-caps;}
@@ -179,7 +179,7 @@ <h2 id="toc-title">On this page</h2>
 
 <header id="title-block-header" class="quarto-title-block default">
 <div class="quarto-title">
-<h1 class="title">The <code>svgling</code> package</h1>
+<h1 class="title">The <code>svgling</code> package: Linguistic tree diagrams in python + SVG</h1>
 </div>
 
 
@@ -196,7 +196,7 @@ <h1 class="title">The <code>svgling</code> package</h1>
     <div>
     <div class="quarto-title-meta-heading">Published</div>
     <div class="quarto-title-meta-contents">
-      <p class="date">October 7, 2023</p>
+      <p class="date">August 20, 2024</p>
     </div>
   </div>
   
@@ -213,7 +213,7 @@ <h1 class="title">The <code>svgling</code> package</h1>
 </div>
 <section id="package-overview" class="level1 page-columns page-full" data-number="1">
 <h1 data-number="1"><span class="header-section-number">1</span> Package overview</h1>
-<p>The <code>svgling</code> package is a pure python package for rendering linguistics-style (constituent) trees in SVG, a vector format well-suited for web use. It accepts trees defined in terms of lists of lists (really, anything indexable) and strings, as well as <code>nltk.Tree</code> objects (or anything with the same API), and is fully integrated with rich display in Jupyter notebooks. This document gives a quick tour of how to use it and some main features; see the full manual for more.</p>
+<p>The <code>svgling</code> package is a pure python package for rendering linguistics-style (constituent) trees in <a href="https://www.w3.org/Graphics/SVG/">SVG (Scalable Vector Graphics)</a>, a standardized vector format well-suited for web use. It accepts trees defined in terms of lists of lists (really, anything indexable) and strings, as well as <code>nltk.Tree</code> objects (or anything with the same API), and is fully integrated with rich display in Jupyter notebooks. This document gives a quick tour of how to use it and some main features; see the full manual for more.</p>
 <p>The package has three main design principles, which together make it relatively unique:</p>
 <ol type="1">
 <li>Be well suited for <em>programmatic</em> generation of tree diagrams via a high-level python api. This means that (a) many tweaks to tree layout are possible via compact and readable python code, and (b) the default settings with no customization should look decent to good on a very wide range of trees and tree styles across all browsers and SVG viewers.</li>
@@ -223,9 +223,8 @@ <h1 data-number="1"><span class="header-section-number">1</span> Package overvie
 <p>The <code>nltk</code> interface is described below; the list interface is pretty straightforward from bracketing notation. (In what follows, “list” is used a generic term that covers any indexable structure, including python lists and tuples.) The first element of the list is the label of a parent node, and any subsequent members of the list are daughter nodes. A parent node without a daughter node is a leaf node (as are non-list strings).</p>
 <section id="installation-and-logistics" class="level2" data-number="1.1">
 <h2 data-number="1.1" class="anchored" data-anchor-id="installation-and-logistics"><span class="header-section-number">1.1</span> Installation and logistics</h2>
-<p>Install from pypi via <code>pip install svgling</code>. On managed jupyter-based systems such as google colab, you can install by entering <code>!pip install svgling</code> into a notebook cell.</p>
-<p><code>svgling</code> can be installed from source via the github repository: <a href="https://github.com/rawlins/svgling">https://github.com/rawlins/svgling</a>. Please <strong>report bugs</strong> via <a href="https://github.com/rawlins/svgling/issues">the issue tracker on github</a> if you encounter any!</p>
-<p>Once it is installed, you can simply run:</p>
+<p>To install the <a href="https://pypi.org/project/svgling/">release version</a> from PyPI, use the <code>pip</code> command line tool: <code>pip install svgling</code>. On managed jupyter-based systems such as google colab, you can install by entering <code>!pip install svgling</code> into a notebook cell. The current unreleased version of <code>svgling</code> can also be installed from source via the github repository: <a href="https://github.com/rawlins/svgling">https://github.com/rawlins/svgling</a>. On a managed system, the simplest way to do this is to run <code>!pip install git+https://github.com/rawlins/svgling</code>. Please <strong>report bugs</strong> on that repository via <a href="https://github.com/rawlins/svgling/issues">the issue tracker on github</a> if you encounter any!</p>
+<p>Once it is installed, to activate the package, you can run:</p>
 <div class="cell" data-execution_count="2">
 <div class="sourceCode cell-code" id="cb1"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="im">import</span> svgling</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
 </div>
diff --git a/manual.html b/manual.html
index 3803922..a2eb384 100644
--- a/manual.html
+++ b/manual.html
@@ -7,7 +7,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
 
 <meta name="author" content="Kyle Rawlins">
-<meta name="dcterms.date" content="2023-11-11">
+<meta name="dcterms.date" content="2024-08-20">
 
 <title>svgling - svgling Manual</title>
 <style>
@@ -222,7 +222,7 @@ <h1 class="title"><code>svgling</code> Manual</h1>
     <div>
     <div class="quarto-title-meta-heading">Published</div>
     <div class="quarto-title-meta-contents">
-      <p class="date">November 11, 2023</p>
+      <p class="date">August 20, 2024</p>
     </div>
   </div>
   
@@ -243,7 +243,7 @@ <h1 class="title"><code>svgling</code> Manual</h1>
 <h1 data-number="1"><span class="header-section-number">1</span> Overview: the <code>svgling</code> tree-drawing package</h1>
 <div class="cell" data-execution_count="2">
 <div class="cell-output cell-output-display">
-<p><strong><code>svgling</code> package version</strong>: 0.4.1-a1</p>
+<p><strong><code>svgling</code> package version</strong>: 0.5.0</p>
 </div>
 </div>
 <p>This document is a detailed guide to using the <code>svgling</code> package; <code>svgling</code> is primarily a python tree-drawing package, aimed at linguists and computer scientists who want to draw constituent trees. It is tailored specifically towards rendering trees in Jupyter, but can be used for programmatically generating SVG and HTML tree diagrams in general – one major external interface for doing this is via the <a href="https://www.nltk.org/">nltk package</a>. Beyond SVG constituent trees, <code>svgling</code> additionally supports a number of other diagram features useful to linguists, and it supports easy exporting to raster images.</p>
@@ -488,11 +488,11 @@ <h2 data-number="4.3" class="anchored" data-anchor-id="overall-layout-options"><
 <p><img src="manual_files/figure-html/cell-23-output-1.svg" class="img-fluid"></p>
 </div>
 </div>
-<p><strong><code>distance_to_daughter</code></strong>: The distance between rows in <em>em</em>s – that is, distance from the bottom of one row to the top of another. Values less than about 0.5 are not recommended and will usually result in rendering oddities. Note that line starts are 0.2<em>em</em>s below a node label, so 0.2 will give completely horizontal lines (not 0.0).</p>
-<p>Default is 2.</p>
+<p><strong><code>distance_to_daughter</code></strong>: The distance between rows in <em>em</em>s – that is, distance from the bottom of one row to the top of another. Values less than about 0.5 are not recommended and will usually result in rendering oddities. Default is 2.</p>
+<p>Note that a margin for glyph descenders is included in the distance between levels (not in the node height), so a value of 0.25<em>em</em>s (by default) will give perfectly straight lines, rather than 0.0. This value can be accessed as <code>svgling.core.NodePos.descender_margin</code>.</p>
 <div class="cell" data-execution_count="23">
 <div class="sourceCode cell-code" id="cb22"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb22-1"><a href="#cb22-1" aria-hidden="true" tabindex="-1"></a>examples <span class="op">=</span> <span class="bu">list</span>()</span>
-<span id="cb22-2"><a href="#cb22-2" aria-hidden="true" tabindex="-1"></a><span class="cf">for</span> i <span class="kw">in</span> (<span class="fl">0.5</span>, <span class="dv">2</span>, <span class="dv">4</span>, <span class="fl">0.2</span>):</span>
+<span id="cb22-2"><a href="#cb22-2" aria-hidden="true" tabindex="-1"></a><span class="cf">for</span> i <span class="kw">in</span> (<span class="fl">0.5</span>, <span class="dv">2</span>, <span class="dv">4</span>, svgling.core.NodePos.descender_margin):</span>
 <span id="cb22-3"><a href="#cb22-3" aria-hidden="true" tabindex="-1"></a>    examples.append(Caption(svgling.draw_tree(t1, distance_to_daughter<span class="op">=</span>i), <span class="st">"Example t1 with distance_to_daughter=</span><span class="sc">%g</span><span class="st">"</span> <span class="op">%</span> i))</span>
 <span id="cb22-4"><a href="#cb22-4" aria-hidden="true" tabindex="-1"></a>RowByRow(<span class="op">*</span>examples)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
 <div class="cell-output cell-output-display" data-execution_count="23">
@@ -509,7 +509,7 @@ <h2 data-number="4.4" class="anchored" data-anchor-id="line-and-node-positioning
 <p><img src="manual_files/figure-html/cell-25-output-1.svg" class="img-fluid"></p>
 </div>
 </div>
-<p><strong><code>descend_direct</code></strong>: When an edge skips levels (currently only possible for leaf nodes, when <code>leaf_nodes_align=True</code>), should the line go directly from the parent to the daughter? If <code>False</code>, the line will go to the position that the daughter would have been at as if there is an empty node there, and descend vertically. This can be useful for very deep trees where a <code>True</code> value results in overlapping, and also just look better. However, it doesn’t allow distinguishing empty nodes visually in the tree. As with empty nodes, the positioning of the line join is affected by <code>vert_align</code>. Defaults to <code>True</code>.</p>
+<p><strong><code>descend_direct</code></strong>: When an edge skips levels (currently only possible for leaf nodes, when <code>leaf_nodes_align=True</code>), should the line go directly from the parent to the daughter? If <code>False</code>, the line will go to the position that the daughter would have been at as if there is an empty node there, and descend vertically. This can be useful for very deep trees where a <code>True</code> value results in overlapping, and also in some cases may just look better. However, it doesn’t allow distinguishing empty nodes visually in the tree. As with empty nodes, the positioning of the line join is affected by <code>vert_align</code>. Defaults to <code>True</code>.</p>
 <p>The following example shows a tree that renders quite badly without this option set to <code>True</code>, because of the asymmetry between leaf node widths.</p>
 <div class="cell" data-execution_count="25">
 <div class="sourceCode cell-code" id="cb24"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb24-1"><a href="#cb24-1" aria-hidden="true" tabindex="-1"></a>t4 <span class="op">=</span> (<span class="st">"A"</span>, <span class="st">"B"</span>, (<span class="st">"C"</span>, (<span class="st">"D"</span>, <span class="st">"middle leaf"</span>), <span class="st">"H"</span>), (<span class="st">"E"</span>, <span class="st">"long leaf"</span>, <span class="st">"G"</span>))</span>
@@ -521,12 +521,13 @@ <h2 data-number="4.4" class="anchored" data-anchor-id="line-and-node-positioning
 <p><img src="manual_files/figure-html/cell-26-output-1.svg" class="img-fluid"></p>
 </div>
 </div>
+<p><strong><code>leaf_edges</code></strong>: set to <code>False</code> to suppress edges leading to leaf nodes; more specifically, this draws the edge as an <code>EmptyEdge</code> still with the default distance value (<code>0.0</code>); see below for more on this edge style.</p>
 </section>
 <section id="edge-styles" class="level2" data-number="4.5">
 <h2 data-number="4.5" class="anchored" data-anchor-id="edge-styles"><span class="header-section-number">4.5</span> Edge styles</h2>
 <p>Custom styles can be applied to specific edges. The main application for this is drawing so-called “triangles of laziness”, but it does also allow you to change the color of particular edges and other related things. There is currently no way to change the edge styles for a tree as a whole (I’ll implement such a thing if there’s demand for it). Be aware that non-direct descents are implemented as an edge style, so if you apply a style to a leaf node with <code>leaf_nodes_align=True</code>, then it can override the indirect descent style; use the <code>IndirectDescent</code> class to avoid this.</p>
-<p>There are three classes that encapsulate edge styles: * <code>svgling.core.EdgeStyle</code> is the default edge style. It allows two svg parameters: <code>stroke</code> and <code>stroke_width</code>. * <code>svgling.core.IndirectDescent</code> implements indirect descents for nodes that skip levels. It inherits the svg parameters of <code>EdgeStyle</code>. * <code>svgling.core.TriangleEdge</code> draws a triangle with points at the center of the parent, and the left and right bounds of the daughter text. (Note that, as usual, text width is calculated heuristically.) This class also inherits the svg parameters of <code>EdgeStyle</code>.</p>
-<p>To set an edge style, call <code>set_edge_style</code> on the layout object with a path and one of the above objects. This function (and most that annotate or modify the style of a tree) modifies a tree object in place, but it also returns <code>self</code> in order to allow repeated styling calls, as in the following example:</p>
+<p>There are several classes that encapsulate edge styles: * <code>svgling.core.EdgeStyle</code> is the default edge style. It allows two svg parameters: <code>stroke</code> and <code>stroke_width</code>. * <code>svgling.core.IndirectDescent</code> implements indirect descents for nodes that skip levels. It inherits the svg parameters of <code>EdgeStyle</code>. This can be set globally via the <code>descend_direct</code>. * <code>svgling.core.TriangleEdge</code> draws a triangle with points at the center of the parent, and the left and right bounds of the daughter text. (Note that, as usual, text width is calculated heuristically.) This class also inherits the svg parameters of <code>EdgeStyle</code>. * <code>svgling.core.EmptyEdge</code> draws nothing at all. This has a configurable <code>distance</code> parameter, defaulting to 0.0. A value of 0.0 puts the top of the lower node at the baseline of the upper node. Pass <code>auto_distance=True</code> to instead use the distance that a regular edge would use. To set a value for all such edges, you can set <code>svgling.core.EmptyEdge.default_distance</code> (<code>None</code> here means use <code>auto_distance=True</code>). A main use of this is to easily do (what will be rendered as) multi-line nodes when working with nltk.</p>
+<p>To set an edge style on a specific edge, call <code>set_edge_style</code> on the layout object with a path and one of the above objects. This function (and most that annotate or modify the style of a tree) modifies a tree object in place, but it also returns <code>self</code> in order to allow repeated styling calls, as in the following example:</p>
 <div class="cell" data-execution_count="26">
 <div class="sourceCode cell-code" id="cb25"><pre class="sourceCode python code-with-copy"><code class="sourceCode python"><span id="cb25-1"><a href="#cb25-1" aria-hidden="true" tabindex="-1"></a>t5 <span class="op">=</span> (<span class="st">"S"</span>, (<span class="st">"NP"</span>, <span class="st">"The subject of this sentence"</span>), (<span class="st">"VP"</span>, <span class="st">"is collapsed"</span>))</span>
 <span id="cb25-2"><a href="#cb25-2" aria-hidden="true" tabindex="-1"></a></span>
@@ -621,16 +622,20 @@ <h2 data-number="4.8" class="anchored" data-anchor-id="sec-custom-nodes"><span c
 <span id="cb29-16"><a href="#cb29-16" aria-hidden="true" tabindex="-1"></a>                                               fill<span class="op">=</span>options.text_color, <span class="co"># use options to set fill/stroke</span></span>
 <span id="cb29-17"><a href="#cb29-17" aria-hidden="true" tabindex="-1"></a>                                               stroke<span class="op">=</span>options.text_stroke)</span>
 <span id="cb29-18"><a href="#cb29-18" aria-hidden="true" tabindex="-1"></a>    <span class="co"># the hard part is figuring out the center point to rotate around, which is in user</span></span>
-<span id="cb29-19"><a href="#cb29-19" aria-hidden="true" tabindex="-1"></a>    <span class="co"># coordinates relative to the node container. This container will add a compensation for</span></span>
-<span id="cb29-20"><a href="#cb29-20" aria-hidden="true" tabindex="-1"></a>    <span class="co"># descenders, so we need to factor that in.</span></span>
-<span id="cb29-21"><a href="#cb29-21" aria-hidden="true" tabindex="-1"></a>    center <span class="op">=</span> (options.em_to_px(width) <span class="op">/</span> <span class="dv">2</span>, options.em_to_px(<span class="fl">0.5</span> <span class="op">+</span> svgling.core.NodePos.descender))</span>
-<span id="cb29-22"><a href="#cb29-22" aria-hidden="true" tabindex="-1"></a>    <span class="cf">if</span> sideways <span class="kw">and</span> <span class="bu">len</span>(text) <span class="op">&gt;</span> <span class="dv">1</span>:</span>
-<span id="cb29-23"><a href="#cb29-23" aria-hidden="true" tabindex="-1"></a>        <span class="co"># exercise left to reader: arbitrary positioning/sizing for sideways nodes that are &gt; 1 char</span></span>
-<span id="cb29-24"><a href="#cb29-24" aria-hidden="true" tabindex="-1"></a>        <span class="cf">raise</span> <span class="pp">NotImplementedError</span>(<span class="st">"Sideways rotation requires len(text)==1"</span>)</span>
-<span id="cb29-25"><a href="#cb29-25" aria-hidden="true" tabindex="-1"></a>    degrees <span class="op">=</span> sideways <span class="kw">and</span> <span class="dv">90</span> <span class="kw">or</span> <span class="dv">180</span></span>
-<span id="cb29-26"><a href="#cb29-26" aria-hidden="true" tabindex="-1"></a>    svgtext.rotate(degrees, center)</span>
-<span id="cb29-27"><a href="#cb29-27" aria-hidden="true" tabindex="-1"></a>    svg_parent.add(svgtext)</span>
-<span id="cb29-28"><a href="#cb29-28" aria-hidden="true" tabindex="-1"></a>    <span class="cf">return</span> svgling.core.NodePos(svg_parent, x<span class="op">=</span><span class="dv">50</span>, y<span class="op">=</span><span class="dv">0</span>, width<span class="op">=</span>width, height<span class="op">=</span><span class="fl">1.0</span>, options<span class="op">=</span>options, text<span class="op">=</span><span class="ss">f"flip_node(</span><span class="sc">{</span>text<span class="sc">}</span><span class="ss">)"</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
+<span id="cb29-19"><a href="#cb29-19" aria-hidden="true" tabindex="-1"></a>    <span class="co"># coordinates relative to the node container. The center position of a line of text</span></span>
+<span id="cb29-20"><a href="#cb29-20" aria-hidden="true" tabindex="-1"></a>    <span class="co"># is not simply 0.5em, because the baseline-to-baseline distance includes space for</span></span>
+<span id="cb29-21"><a href="#cb29-21" aria-hidden="true" tabindex="-1"></a>    <span class="co"># an ascender, and not space for a descender. In addition, the normal node margin</span></span>
+<span id="cb29-22"><a href="#cb29-22" aria-hidden="true" tabindex="-1"></a>    <span class="co"># applies only to the bottom of a node, not the top. Therefore, adjust the center</span></span>
+<span id="cb29-23"><a href="#cb29-23" aria-hidden="true" tabindex="-1"></a>    <span class="co"># downwards by approximately the height of a descender, to ensure half a descender</span></span>
+<span id="cb29-24"><a href="#cb29-24" aria-hidden="true" tabindex="-1"></a>    <span class="co"># margin on each side.</span></span>
+<span id="cb29-25"><a href="#cb29-25" aria-hidden="true" tabindex="-1"></a>    center <span class="op">=</span> (options.em_to_px(width) <span class="op">/</span> <span class="dv">2</span>, options.em_to_px(<span class="fl">0.5</span> <span class="op">+</span> svgling.core.NodePos.descender_margin))</span>
+<span id="cb29-26"><a href="#cb29-26" aria-hidden="true" tabindex="-1"></a>    <span class="cf">if</span> sideways <span class="kw">and</span> <span class="bu">len</span>(text) <span class="op">&gt;</span> <span class="dv">1</span>:</span>
+<span id="cb29-27"><a href="#cb29-27" aria-hidden="true" tabindex="-1"></a>        <span class="co"># exercise left to reader: arbitrary positioning/sizing for sideways nodes that are &gt; 1 char</span></span>
+<span id="cb29-28"><a href="#cb29-28" aria-hidden="true" tabindex="-1"></a>        <span class="cf">raise</span> <span class="pp">NotImplementedError</span>(<span class="st">"Sideways rotation requires len(text)==1"</span>)</span>
+<span id="cb29-29"><a href="#cb29-29" aria-hidden="true" tabindex="-1"></a>    degrees <span class="op">=</span> sideways <span class="kw">and</span> <span class="dv">90</span> <span class="kw">or</span> <span class="dv">180</span></span>
+<span id="cb29-30"><a href="#cb29-30" aria-hidden="true" tabindex="-1"></a>    svgtext.rotate(degrees, center)</span>
+<span id="cb29-31"><a href="#cb29-31" aria-hidden="true" tabindex="-1"></a>    svg_parent.add(svgtext)</span>
+<span id="cb29-32"><a href="#cb29-32" aria-hidden="true" tabindex="-1"></a>    <span class="cf">return</span> svgling.core.NodePos(svg_parent, x<span class="op">=</span><span class="dv">50</span>, y<span class="op">=</span><span class="dv">0</span>, width<span class="op">=</span>width, height<span class="op">=</span><span class="fl">1.0</span>, options<span class="op">=</span>options, text<span class="op">=</span><span class="ss">f"flip_node(</span><span class="sc">{</span>text<span class="sc">}</span><span class="ss">)"</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
 </div>
 <p>For debugging purposes, the return value of one of these objects can be inspected directly (though note that exceptions will not be shown unless you manually call <code>_repr_svg_</code>):</p>
 <div class="cell" data-execution_count="31">
diff --git a/manual_files/figure-html/cell-15-output-1.svg b/manual_files/figure-html/cell-15-output-1.svg
index d9c9da7..4c2606e 100644
--- a/manual_files/figure-html/cell-15-output-1.svg
+++ b/manual_files/figure-html/cell-15-output-1.svg
@@ -1 +1 @@
-<svg baseProfile="full" height="216px" preserveAspectRatio="xMidYMid meet" style="font-family: times, serif; font-weight: normal; font-style: normal; font-size: 16px" version="1.1" viewBox="0,0,296.0,216.0" width="296px" xmlns="http://www.w3.org/2000/svg" xmlns:ev="http://www.w3.org/2001/xml-events" xmlns:xlink="http://www.w3.org/1999/xlink"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">S</text></svg><svg width="40.5405%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">NP</text></svg><svg width="33.3333%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">D</text></svg><svg width="100%" x="0%" y="96px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">the</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="96px" /></svg><line stroke="black" x1="50%" x2="16.6667%" y1="20px" y2="48px" /><svg width="66.6667%" x="33.3333%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">N</text></svg><svg width="100%" x="0%" y="96px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">elephant</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="96px" /></svg><line stroke="black" x1="50%" x2="66.6667%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="20.2703%" y1="20px" y2="48px" /><svg width="59.4595%" x="40.5405%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">VP</text></svg><svg width="22.7273%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">V</text></svg><svg width="100%" x="0%" y="96px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">saw</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="96px" /></svg><line stroke="black" x1="50%" x2="11.3636%" y1="20px" y2="48px" /><svg width="77.2727%" x="22.7273%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">NP</text></svg><svg width="29.4118%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">D</text></svg><svg width="100%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">the</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="14.7059%" y1="20px" y2="48px" /><svg width="70.5882%" x="29.4118%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">N</text></svg><svg width="100%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">rhinoceros</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="64.7059%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="61.3636%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="70.2703%" y1="20px" y2="48px" /></svg>
\ No newline at end of file
+<svg baseProfile="full" height="216px" preserveAspectRatio="xMidYMid meet" style="font-family: times, serif; font-weight: normal; font-style: normal; font-size: 16px" version="1.1" viewBox="0,0,296.0,216.0" width="296px" xmlns="http://www.w3.org/2000/svg" xmlns:ev="http://www.w3.org/2001/xml-events" xmlns:xlink="http://www.w3.org/1999/xlink"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">S</text></svg><svg width="40.5405%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">NP</text></svg><svg width="33.3333%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">D</text></svg><svg width="100%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">the</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="16.6667%" y1="20px" y2="48px" /><svg width="66.6667%" x="33.3333%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">N</text></svg><svg width="100%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">elephant</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="66.6667%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="20.2703%" y1="20px" y2="48px" /><svg width="59.4595%" x="40.5405%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">VP</text></svg><svg width="22.7273%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">V</text></svg><svg width="100%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">saw</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="11.3636%" y1="20px" y2="48px" /><svg width="77.2727%" x="22.7273%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">NP</text></svg><svg width="29.4118%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">D</text></svg><svg width="100%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">the</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="14.7059%" y1="20px" y2="48px" /><svg width="70.5882%" x="29.4118%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">N</text></svg><svg width="100%" x="0%" y="48px"><defs /><svg width="100%" x="0" y="0px"><defs /><text text-anchor="middle" x="50%" y="16px">rhinoceros</text></svg></svg><line stroke="black" x1="50%" x2="50%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="64.7059%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="61.3636%" y1="20px" y2="48px" /></svg><line stroke="black" x1="50%" x2="70.2703%" y1="20px" y2="48px" /></svg>
\ No newline at end of file
diff --git a/manual_files/figure-html/cell-24-output-1.svg b/manual_files/figure-html/cell-24-output-1.svg
index c6e8ea6..5b70fab 100644
--- a/manual_files/figure-html/cell-24-output-1.svg
+++ b/manual_files/figure-html/cell-24-output-1.svg
@@ -1 +1 @@
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font-weight:normal; font-style: italic; font-size: 13px;" text-anchor="middle" x="50%" y="1em">Example t1 with distance_to_daughter=0.2</text></svg></svg></svg></svg>
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font-weight:normal; font-style: italic; font-size: 13px;" text-anchor="middle" x="50%" y="1em">Example t1 with distance_to_daughter=0.25</text></svg></svg></svg></svg>
\ No newline at end of file
diff --git a/search.json b/search.json
index 6c29fc7..efd292f 100644
--- a/search.json
+++ b/search.json
@@ -2,35 +2,35 @@
   {
     "objectID": "index.html#installation-and-logistics",
     "href": "index.html#installation-and-logistics",
-    "title": "The svgling package",
+    "title": "The svgling package: Linguistic tree diagrams in python + SVG",
     "section": "1.1 Installation and logistics",
-    "text": "1.1 Installation and logistics\nInstall from pypi via pip install svgling. On managed jupyter-based systems such as google colab, you can install by entering !pip install svgling into a notebook cell.\nsvgling can be installed from source via the github repository: https://github.com/rawlins/svgling. Please report bugs via the issue tracker on github if you encounter any!\nOnce it is installed, you can simply run:\n\nimport svgling\n\nIf you would like to reset tree drawing options to the default on import, you can call:\n\nsvgling.core.reset_defaults()"
+    "text": "1.1 Installation and logistics\nTo install the release version from PyPI, use the pip command line tool: pip install svgling. On managed jupyter-based systems such as google colab, you can install by entering !pip install svgling into a notebook cell. The current unreleased version of svgling can also be installed from source via the github repository: https://github.com/rawlins/svgling. On a managed system, the simplest way to do this is to run !pip install git+https://github.com/rawlins/svgling. Please report bugs on that repository via the issue tracker on github if you encounter any!\nOnce it is installed, to activate the package, you can run:\n\nimport svgling\n\nIf you would like to reset tree drawing options to the default on import, you can call:\n\nsvgling.core.reset_defaults()"
   },
   {
     "objectID": "index.html#basic-usage",
     "href": "index.html#basic-usage",
-    "title": "The svgling package",
+    "title": "The svgling package: Linguistic tree diagrams in python + SVG",
     "section": "1.2 Basic usage",
     "text": "1.2 Basic usage\nFor convenient use in Jupyter notebooks, the main function to try is svgling.draw_tree:\n\nsvgling.draw_tree((\"S\", \"NP\", \"VP\"))\n\n\n\n\nAs a shortcut, the outer bracketing here can be omitted:\n\nsvgling.draw_tree(\"S\", \"NP\", (\"VP\", \"V\"))\n\n\n\n\nMulti-line nodes are generally possible. Simply provide the node as a string that includes \\n where a linebreak is desired. The next example, a more complex tree with multi-line leaf nodes, also shows how to get the leaf nodes to be lined up with each other. (This tree is from Carnie 2013, Syntax: a generative introduction (3rd ed.), p. 93.)\n\nsvgling.draw_tree(\"TP\", (\"NP\", \"D\\nThe\", (\"AdjP\", (\"AdvP\", \"Adv\\nvery\"), \"Adj\\nsmall\"), \"N\\nboy\"), (\"VP\", \"V\\nkissed\", (\"NP\", \"D\\nthe\", \"N\\nplatypus\")), leaf_nodes_align=True)"
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   {
     "objectID": "index.html#more-advanced-tricks",
     "href": "index.html#more-advanced-tricks",
-    "title": "The svgling package",
+    "title": "The svgling package: Linguistic tree diagrams in python + SVG",
     "section": "1.3 More advanced tricks",
     "text": "1.3 More advanced tricks\nThe svgling package supports a wide range of complex formatting as well as “tree annotations” like movement arrows. The following example provides a quick illustration; see the full package manual for a complete list of possible formatting options.\nThis example illustrates a typical tree for Quantifier Raising in the Heim & Kratzer 1998 (“Semantics in Generative Grammar”) style, illustrating movement arrows and tree annotation from the svgling.figure module. See the diagram gallery for an even more elaborate variant of this example.\n\nt2 = (\"TP\", (\"DP\", (\"D\", \"every\"), (\"NP\", (\"N\", \"cat\"))),\n           (\"TP\", \"1\", (\"TP\", (\"DP\", (\"D\", \"some\"), (\"NP\", (\"N\", \"dog\"))),\n                     (\"TP\", \"3\", (\"TP\", (\"DP\", svgling.core.subscript_node(\"t\", \"1\")),\n                                  (\"VP\", (\"V\", \"likes\"), (\"DP\", svgling.core.subscript_node(\"t\", \"3\"))))))))\n\nsvgling.core.reset_defaults() # reset any defaults in case this is run out of order\nf = svgling.core.cssfont(\"verdana, arial, sans-serif\", style=\"oblique\")\n\n(svgling.draw_tree(t2, leaf_padding=3) # use a slightly wider padding than the default\n    # mark binders and traces in red\n    .set_node_style((1,0), text_color=\"red\")\n    .set_node_style((1,1,1,0), text_color=\"red\")\n    .set_node_style((1,1,1,1,0,0), text_color=\"red\")\n    .set_node_style((1,1,1,1,1,1,0), text_color=\"red\")\n    # set leaf nodes in bold sans-serif\n    .set_leaf_style(font_style=f)\n    # draw movement arrows and underline moved constituents\n    .movement_arrow((1,1,1,1,0), (0,))\n    .underline_constituent((0,))\n    .movement_arrow((1,1,1,1,1,1), (1,1,0))\n    .underline_constituent((1,1,0)))"
   },
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     "objectID": "index.html#integration-with-nltk",
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-    "title": "The svgling package",
+    "title": "The svgling package: Linguistic tree diagrams in python + SVG",
     "section": "2.1 Integration with NLTK",
     "text": "2.1 Integration with NLTK\nThe svgling package is well-integrated with the nltk (https://www.nltk.org/) package. This package uses svgling for rendering of nltk.tree.Tree objects in Jupyter by default (using it to implement a _repr_svg_(), and svgling supports nltk.tree.Tree objects in any context where a tree can be provided.\n\nimport nltk\nt3 = nltk.Tree.fromstring(\"(S (NP (D the) (N elephant)) (VP (V saw) (NP (D the) (N rhinoceros))))\")\nt3\n\n\n\n\nOptions available as named parameters can also be set on a global basis by modifying the options object at svgling.core.default_options, and this provides a quick way to change settings for nltk trees. For example, to change font size for all rendered trees:\nsvgling.core.default_options.font_size = 20\nGlobal defaults can be reset via svgling.core.reset_defaults().\nFor more complex styling of nltk trees, including tree annotations, you can directly supply a nltk.tree.Tree object to svgling.draw_tree:\n\nsvgling.draw_tree(t3, leaf_nodes_align=True).box_constituent((0,))\n\n\n\n\nOther parts of svgling support Trees as well, in particular, the svgling.figure utility classes."
   },
   {
     "objectID": "index.html#exporting-to-raster-formats",
     "href": "index.html#exporting-to-raster-formats",
-    "title": "The svgling package",
+    "title": "The svgling package: Linguistic tree diagrams in python + SVG",
     "section": "2.2 Exporting to raster formats",
     "text": "2.2 Exporting to raster formats\nThe svgling packages supports exporting to raster formats via cairosvg. Convenience wrappers are provided via svgling.util, and the full cairosvg api can be used as well. See the manual for more details, but here is an example of one of t3 as a png:\n\nimport cairosvg # this cell needs cairosvg in order to run\nimport svgling.utils, svgling.semantics\nfrom IPython.display import Image\nt = svgling.semantics.DoubleBrackets(t3)\nImage(svgling.utils.svg2png(t, scale=1.5))"
   },
@@ -91,8 +91,8 @@
     "text": "This version is intended to be the last release that is marked as a beta / pre-1.0 version.\nNew features:\n\nSupport for arbitrary SVG node contents, via the node_builder decorator\nSupport for handling of custom tree node classes, via the TreeOptions option tree_split, as well as a pre-provided handler for nltk’s ProbabilisticTree class\nBuilt-in node builder (svgling.core.subscript_node) for nodes that have a subscript\nA figure class HTMLSideBySide that allows mixing hybrid HTML diagrams with SVG diagrams\n\nDocumentation:\n\nMajor documentation improvements, convert docs to quarto\n\nFixes, improvements, changes:\n\nSupport a repeated call notation for most TreeLayout public functions\nImprovements to the draw_tree and tree2svg APIs\nFix for constituent underlines at the exact lower edge of a figure\nCompatibility mode for rendering (some) svgling.html diagrams in quarto\nRefactor of the node construction API that goes along with the node_builder change\nBuild/install improvements\n\n\n\n\nAs of 0.3.1, svgling is the default tree-drawing package for nltk Trees in Jupyter; this update provides better compatibility for that. It also improves some styling options, and direct support for format conversion.\nNew features:\n\nLimited per-node styling in trees: supports changing font style, size, and color/fill\nconvenience wrappers to make conversion to PNG/PDF via the cairosvg package easier (cairosvg is now an optional package dependency)\nSupport nltk.Tree objects directly in svgling.figure classes\n\nFixes, improvements, changes:\n\nSimplify import code for nltk, remove monkeypatching\nThe option global_font_style is renamed to just font_style\nRefactor TreeOptions to make it easier to pass around options bundles\nDefault change: relative_units=False. This provides better compatibility with inkscape, among other things. This option is now deprecated.\nDocumentation improvements\n\n\n\n\nNew feature:\n\nCompatibility mode aimed at Inkscape: allow using px instead of relative em units. This allows current versions of Inkscape to load the output SVGs. This mode is not on by default.\n\nFixes, improvements, changes:\n\nUpdate documentation to reflect some issues in MathJax math mode delimeter choice for hybrid mode.\n\n\n\n\nNew features:\n\nBasic support for drawing trees using a mix of HTML/CSS (for positioning) and SVG (for line drawing). This is much more limited than the core drawing algorithms, but allows for arbitrary node labels + MathJax.\n\nFixes, improvements, changes:\n\nImprove documentation\n\n\n\n\nNew features:\n\nSupport for multi-line nodes.\nEdge styles, muti-segment descents for level skipping.\nWrote a manual.\nTree annotations: movement arrows, constituent highlighting / underlining.\nComplex figures: grids of trees, captioning.\n\nFixes, improvements, changes:\n\nMassively improve responsivity of svgling diagrams.\nTreeLayout objects manage font size directly.\ndistance_to_daughter is now a distance between levels, i.e. excluding node height.\n\n\n\n\n\nFix for non-leaf nodes that are larger than the leaf nodes they dominate.\nMore flexible arguments to draw_tree (will accept the top node + children via variable arguments, rather than a list/tuple as the first argument.)\nDocumentation improvements.\n\n\n\n\n\nSupport for basic tree drawing with lists and nltk.tree.Tree objects."
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-    "href": "CHANGELOG.html#unreleased",
+    "objectID": "CHANGELOG.html#node-styling-and-compatibility---2024-08.20",
+    "href": "CHANGELOG.html#node-styling-and-compatibility---2024-08.20",
     "title": "Changelog for svgling",
     "section": "",
     "text": "This version is intended to be the last release that is marked as a beta / pre-1.0 version.\nNew features:\n\nSupport for arbitrary SVG node contents, via the node_builder decorator\nSupport for handling of custom tree node classes, via the TreeOptions option tree_split, as well as a pre-provided handler for nltk’s ProbabilisticTree class\nBuilt-in node builder (svgling.core.subscript_node) for nodes that have a subscript\nA figure class HTMLSideBySide that allows mixing hybrid HTML diagrams with SVG diagrams\n\nDocumentation:\n\nMajor documentation improvements, convert docs to quarto\n\nFixes, improvements, changes:\n\nSupport a repeated call notation for most TreeLayout public functions\nImprovements to the draw_tree and tree2svg APIs\nFix for constituent underlines at the exact lower edge of a figure\nCompatibility mode for rendering (some) svgling.html diagrams in quarto\nRefactor of the node construction API that goes along with the node_builder change\nBuild/install improvements"
@@ -179,21 +179,21 @@
     "href": "manual.html#overall-layout-options",
     "title": "svgling Manual",
     "section": "4.3 Overall layout options",
-    "text": "4.3 Overall layout options\nThe following are TreeOptions parameters that affect layout.\nhoriz_spacing: This parameter determines how daughter nodes are spaced horizontally relative to the parent. Possible values are svgling.core.HorizSpacing.TEXT (default; space proportionally based on estimated text width), svgling.core.HorizSpacing.EVEN (space evenly based on number of immediate daughters), and svgling.core.HorizSpacing.NODES (space proportionally to the number of leaf nodes in the subtrees).\nUsually TEXT looks best, but the other two may be preferable for abstract trees where label widths are all similar. Without manual adjustment, the two other options will deal poorly with long labels.\n\nexamples = list()\ndemo_trees = [t0, t1]\nfor opt in svgling.core.HorizSpacing:\n    row = list()\n    for t in range(len(demo_trees)):\n        # debug mode on so that the exact rendering differences are very obvious\n        row.append(Caption(svgling.draw_tree(demo_trees[t], horiz_spacing=opt, debug=True), \"Example t%d with horiz_spacing=%s\" % (t, str(opt))))\n    examples.append(SideBySide(*row))\n\nRowByRow(*examples)\n\n\n\n\naverage_glyph_width: A heuristic factor used to calculate text widths; basically, a divisor in ems. Defaults to 2.0. Does not generally need to be adjusted for default settings (which try to just use Times), but may be worth adjusting for custom fonts.\nleaf_padding: An amount to pad each leaf by, in glyphs. Will be divided by average_glyph_width. Default is 2. Negative values are possible, but will usually result in text being cut off. Leaf padding is applied as a constant to the overall canvas size regardless of the value of horiz_spacing (i.e. the canvas size is always determined by the sum of node widths plus leaf padding at every widest subtree), so will impact spacing to some degree for any setting of this option, but is only applied directly to each leaf for HorizSpacing.TEXT.\n\nexamples = list()\nfor i in (0, 2, 5, -2):\n    examples.append(Caption(svgling.draw_tree(t1, leaf_padding=i), \"Example t1 with leaf_padding=%g\" % i))\nRowByRow(*examples)\n\n\n\n\nvert_align: How row alignment when there are multi-line labels should be calculated. If all labels in a row have the same height, this has no impact, but if there are differences, it controls the position of the shorter node labels vertically. Default is centered. For empty labels, this affects the position of the line join. The values TOP, CENTER, and BOTTOM are self-explanatory. svgling.VertAlign.EVEN causes all nodes to be treated as the same height (relative to their row) regardless of text contents, even empty nodes.\n\nt4 = (\"X\", (\"multiline\\nlabel\", \"Y\"), (\"\", \"Z\\nA\"), (\"A\", \"B\"), \"C\")\n\nexamples = list()\nfor opt in svgling.core.VertAlign:\n    examples.append(Caption(svgling.draw_tree(t4, vert_align=opt), \"Example t4 with vert_align=%s\" % str(opt)))\n\nRowByRow(*examples)\n\n\n\n\ndistance_to_daughter: The distance between rows in ems – that is, distance from the bottom of one row to the top of another. Values less than about 0.5 are not recommended and will usually result in rendering oddities. Note that line starts are 0.2ems below a node label, so 0.2 will give completely horizontal lines (not 0.0).\nDefault is 2.\n\nexamples = list()\nfor i in (0.5, 2, 4, 0.2):\n    examples.append(Caption(svgling.draw_tree(t1, distance_to_daughter=i), \"Example t1 with distance_to_daughter=%g\" % i))\nRowByRow(*examples)"
+    "text": "4.3 Overall layout options\nThe following are TreeOptions parameters that affect layout.\nhoriz_spacing: This parameter determines how daughter nodes are spaced horizontally relative to the parent. Possible values are svgling.core.HorizSpacing.TEXT (default; space proportionally based on estimated text width), svgling.core.HorizSpacing.EVEN (space evenly based on number of immediate daughters), and svgling.core.HorizSpacing.NODES (space proportionally to the number of leaf nodes in the subtrees).\nUsually TEXT looks best, but the other two may be preferable for abstract trees where label widths are all similar. Without manual adjustment, the two other options will deal poorly with long labels.\n\nexamples = list()\ndemo_trees = [t0, t1]\nfor opt in svgling.core.HorizSpacing:\n    row = list()\n    for t in range(len(demo_trees)):\n        # debug mode on so that the exact rendering differences are very obvious\n        row.append(Caption(svgling.draw_tree(demo_trees[t], horiz_spacing=opt, debug=True), \"Example t%d with horiz_spacing=%s\" % (t, str(opt))))\n    examples.append(SideBySide(*row))\n\nRowByRow(*examples)\n\n\n\n\naverage_glyph_width: A heuristic factor used to calculate text widths; basically, a divisor in ems. Defaults to 2.0. Does not generally need to be adjusted for default settings (which try to just use Times), but may be worth adjusting for custom fonts.\nleaf_padding: An amount to pad each leaf by, in glyphs. Will be divided by average_glyph_width. Default is 2. Negative values are possible, but will usually result in text being cut off. Leaf padding is applied as a constant to the overall canvas size regardless of the value of horiz_spacing (i.e. the canvas size is always determined by the sum of node widths plus leaf padding at every widest subtree), so will impact spacing to some degree for any setting of this option, but is only applied directly to each leaf for HorizSpacing.TEXT.\n\nexamples = list()\nfor i in (0, 2, 5, -2):\n    examples.append(Caption(svgling.draw_tree(t1, leaf_padding=i), \"Example t1 with leaf_padding=%g\" % i))\nRowByRow(*examples)\n\n\n\n\nvert_align: How row alignment when there are multi-line labels should be calculated. If all labels in a row have the same height, this has no impact, but if there are differences, it controls the position of the shorter node labels vertically. Default is centered. For empty labels, this affects the position of the line join. The values TOP, CENTER, and BOTTOM are self-explanatory. svgling.VertAlign.EVEN causes all nodes to be treated as the same height (relative to their row) regardless of text contents, even empty nodes.\n\nt4 = (\"X\", (\"multiline\\nlabel\", \"Y\"), (\"\", \"Z\\nA\"), (\"A\", \"B\"), \"C\")\n\nexamples = list()\nfor opt in svgling.core.VertAlign:\n    examples.append(Caption(svgling.draw_tree(t4, vert_align=opt), \"Example t4 with vert_align=%s\" % str(opt)))\n\nRowByRow(*examples)\n\n\n\n\ndistance_to_daughter: The distance between rows in ems – that is, distance from the bottom of one row to the top of another. Values less than about 0.5 are not recommended and will usually result in rendering oddities. Default is 2.\nNote that a margin for glyph descenders is included in the distance between levels (not in the node height), so a value of 0.25ems (by default) will give perfectly straight lines, rather than 0.0. This value can be accessed as svgling.core.NodePos.descender_margin.\n\nexamples = list()\nfor i in (0.5, 2, 4, svgling.core.NodePos.descender_margin):\n    examples.append(Caption(svgling.draw_tree(t1, distance_to_daughter=i), \"Example t1 with distance_to_daughter=%g\" % i))\nRowByRow(*examples)"
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     "title": "svgling Manual",
     "section": "4.4 Line and node positioning options",
-    "text": "4.4 Line and node positioning options\nleaf_nodes_align: if true, will align all leaf nodes with the lowest depth leaf nodes in the tree.\n\nSideBySide(svgling.draw_tree(t1, leaf_nodes_align=True), svgling.draw_tree(\"DP\", \"D\\nthe\", (\"AP\", \"A\\ngray\"), (\"NP\", \"N\\ncat\"), leaf_nodes_align=True))\n\n\n\n\ndescend_direct: When an edge skips levels (currently only possible for leaf nodes, when leaf_nodes_align=True), should the line go directly from the parent to the daughter? If False, the line will go to the position that the daughter would have been at as if there is an empty node there, and descend vertically. This can be useful for very deep trees where a True value results in overlapping, and also just look better. However, it doesn’t allow distinguishing empty nodes visually in the tree. As with empty nodes, the positioning of the line join is affected by vert_align. Defaults to True.\nThe following example shows a tree that renders quite badly without this option set to True, because of the asymmetry between leaf node widths.\n\nt4 = (\"A\", \"B\", (\"C\", (\"D\", \"middle leaf\"), \"H\"), (\"E\", \"long leaf\", \"G\"))\nexamples = list()\nfor opt in (True, False):\n    examples.append(Caption(svgling.draw_tree(t4, leaf_nodes_align=True, descend_direct=opt), \"Example t4 with descend_direct=%s\" % str(opt)))\nSideBySide(*examples)"
+    "text": "4.4 Line and node positioning options\nleaf_nodes_align: if true, will align all leaf nodes with the lowest depth leaf nodes in the tree.\n\nSideBySide(svgling.draw_tree(t1, leaf_nodes_align=True), svgling.draw_tree(\"DP\", \"D\\nthe\", (\"AP\", \"A\\ngray\"), (\"NP\", \"N\\ncat\"), leaf_nodes_align=True))\n\n\n\n\ndescend_direct: When an edge skips levels (currently only possible for leaf nodes, when leaf_nodes_align=True), should the line go directly from the parent to the daughter? If False, the line will go to the position that the daughter would have been at as if there is an empty node there, and descend vertically. This can be useful for very deep trees where a True value results in overlapping, and also in some cases may just look better. However, it doesn’t allow distinguishing empty nodes visually in the tree. As with empty nodes, the positioning of the line join is affected by vert_align. Defaults to True.\nThe following example shows a tree that renders quite badly without this option set to True, because of the asymmetry between leaf node widths.\n\nt4 = (\"A\", \"B\", (\"C\", (\"D\", \"middle leaf\"), \"H\"), (\"E\", \"long leaf\", \"G\"))\nexamples = list()\nfor opt in (True, False):\n    examples.append(Caption(svgling.draw_tree(t4, leaf_nodes_align=True, descend_direct=opt), \"Example t4 with descend_direct=%s\" % str(opt)))\nSideBySide(*examples)\n\n\n\n\nleaf_edges: set to False to suppress edges leading to leaf nodes; more specifically, this draws the edge as an EmptyEdge still with the default distance value (0.0); see below for more on this edge style."
   },
   {
     "objectID": "manual.html#edge-styles",
     "href": "manual.html#edge-styles",
     "title": "svgling Manual",
     "section": "4.5 Edge styles",
-    "text": "4.5 Edge styles\nCustom styles can be applied to specific edges. The main application for this is drawing so-called “triangles of laziness”, but it does also allow you to change the color of particular edges and other related things. There is currently no way to change the edge styles for a tree as a whole (I’ll implement such a thing if there’s demand for it). Be aware that non-direct descents are implemented as an edge style, so if you apply a style to a leaf node with leaf_nodes_align=True, then it can override the indirect descent style; use the IndirectDescent class to avoid this.\nThere are three classes that encapsulate edge styles: * svgling.core.EdgeStyle is the default edge style. It allows two svg parameters: stroke and stroke_width. * svgling.core.IndirectDescent implements indirect descents for nodes that skip levels. It inherits the svg parameters of EdgeStyle. * svgling.core.TriangleEdge draws a triangle with points at the center of the parent, and the left and right bounds of the daughter text. (Note that, as usual, text width is calculated heuristically.) This class also inherits the svg parameters of EdgeStyle.\nTo set an edge style, call set_edge_style on the layout object with a path and one of the above objects. This function (and most that annotate or modify the style of a tree) modifies a tree object in place, but it also returns self in order to allow repeated styling calls, as in the following example:\n\nt5 = (\"S\", (\"NP\", \"The subject of this sentence\"), (\"VP\", \"is collapsed\"))\n\n# repeated styling calls without an intermediate assignment:\nout = (svgling.draw_tree(t5)\n       .set_edge_style((0,0), svgling.core.TriangleEdge())\n       .set_edge_style((1,0), svgling.core.TriangleEdge()))\n\n# now for some gratuitous formatting. Let's use a simpler assignment style for this one:\nout.set_edge_style((0,), svgling.core.EdgeStyle(stroke_width=4, stroke=\"red\"))\nout.set_edge_style((1,), svgling.core.EdgeStyle(stroke_width=4))\nout\n\n\n\n\nGiven a tree object with arbitrary styling, you can obtain a default-styled instance of the tree by calling reset(). This function returns a copy, and does not modify the original.\n\nout.reset()"
+    "text": "4.5 Edge styles\nCustom styles can be applied to specific edges. The main application for this is drawing so-called “triangles of laziness”, but it does also allow you to change the color of particular edges and other related things. There is currently no way to change the edge styles for a tree as a whole (I’ll implement such a thing if there’s demand for it). Be aware that non-direct descents are implemented as an edge style, so if you apply a style to a leaf node with leaf_nodes_align=True, then it can override the indirect descent style; use the IndirectDescent class to avoid this.\nThere are several classes that encapsulate edge styles: * svgling.core.EdgeStyle is the default edge style. It allows two svg parameters: stroke and stroke_width. * svgling.core.IndirectDescent implements indirect descents for nodes that skip levels. It inherits the svg parameters of EdgeStyle. This can be set globally via the descend_direct. * svgling.core.TriangleEdge draws a triangle with points at the center of the parent, and the left and right bounds of the daughter text. (Note that, as usual, text width is calculated heuristically.) This class also inherits the svg parameters of EdgeStyle. * svgling.core.EmptyEdge draws nothing at all. This has a configurable distance parameter, defaulting to 0.0. A value of 0.0 puts the top of the lower node at the baseline of the upper node. Pass auto_distance=True to instead use the distance that a regular edge would use. To set a value for all such edges, you can set svgling.core.EmptyEdge.default_distance (None here means use auto_distance=True). A main use of this is to easily do (what will be rendered as) multi-line nodes when working with nltk.\nTo set an edge style on a specific edge, call set_edge_style on the layout object with a path and one of the above objects. This function (and most that annotate or modify the style of a tree) modifies a tree object in place, but it also returns self in order to allow repeated styling calls, as in the following example:\n\nt5 = (\"S\", (\"NP\", \"The subject of this sentence\"), (\"VP\", \"is collapsed\"))\n\n# repeated styling calls without an intermediate assignment:\nout = (svgling.draw_tree(t5)\n       .set_edge_style((0,0), svgling.core.TriangleEdge())\n       .set_edge_style((1,0), svgling.core.TriangleEdge()))\n\n# now for some gratuitous formatting. Let's use a simpler assignment style for this one:\nout.set_edge_style((0,), svgling.core.EdgeStyle(stroke_width=4, stroke=\"red\"))\nout.set_edge_style((1,), svgling.core.EdgeStyle(stroke_width=4))\nout\n\n\n\n\nGiven a tree object with arbitrary styling, you can obtain a default-styled instance of the tree by calling reset(). This function returns a copy, and does not modify the original.\n\nout.reset()"
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@@ -214,7 +214,7 @@
     "href": "manual.html#sec-custom-nodes",
     "title": "svgling Manual",
     "section": "4.8 Advanced: custom node rendering",
-    "text": "4.8 Advanced: custom node rendering\nSection 2.2 provided examples of how to use the built-in node builder functions. The svgling package also allows you to define custom node-builder functions, and by doing so, use arbitrary SVG in a tree node, via the svgwrite package. A node-builder function should be decorated with @svgling.core.node_builder and return a svgling.core.NodePos object that has the correct dimensions set (currently, these cannot be inferred from SVG). NodePos is a wrapper class for an arbitrary SVG object using the svgwrite package. The details of constructing SVG diagrams progamattically go somewhat beyond the scope of this manual, and I won’t explain the SVG format or the svgwrite api in detail here. But generally, you will want to construct svgwrite.container.SVG objects that contain svgwrite.text.Text objects, possibly with svgwrite.text.TSpan objects within those.\nSpecific notes on constructing NodePos and the contained svg objects:\n\nMinimally, the returned NodePos should have width and height set (otherwise, they default to 0). These can be set as named parameters to the constructor, or via the set_dimensions function, which also takes them as named parameters.\nIt is also recommended to set text to something readable, so that the object can be inspected without svg rendering.\nx and y can be used to shift position relative to the tree; x=50 centers (and is probably what you want in most cases).\nUser coordinates can be assumed to match px, and for text rendering, unless you explicitly set font size, you should use the provided options value to get font sizing via em (provides a string with units) and em_to_px (provides a number in user coordinates).\nThe options parameter will be filled in when building a tree, but you should allow for direct calls for debugging.\nThe position of 0,0 is relative to a container constructed on top of NodePos. You can assume that it will have the width specified by NodePos, with height specified by NodePos with some extra y space; the below example demonstrates this.\nTips: use debug mode. Draw reference points when testing (e.g. svgwrite.shapes.Circle((0,0), r=3, fill=options.text_color)).\n\nThe following cell provides a small example of implementing a node builder. As you can see, the svg standard is the limit in what you can draw here, but dealing with positioning is overall not entirely trivial. A good node builder will also be responsive to the options provided from a tree context, illustrated in the text settings below.\n\nimport svgwrite\n\n@svgling.core.node_builder\ndef flip_node(text, sideways=False, options=None):\n    if options is None:\n        options = svgling.core.TreeOptions()\n\n    # get the text width in `em`s based on the input string\n    width = options.label_width(text)\n    svg_parent = svgwrite.container.SVG(x=0, y=0, width=\"100%\")\n    # general recipe for setting up an appropriate Text object. We are inheriting\n    # style from the tree other than these.\n    svgtext = svgwrite.text.Text(text, insert=(\"50%\", # x pos at 50%\n                                               svgling.core.em(1, options)), # y pos (baseline) at 1em\n                                               text_anchor=\"middle\", # align text in the middle\n                                               fill=options.text_color, # use options to set fill/stroke\n                                               stroke=options.text_stroke)\n    # the hard part is figuring out the center point to rotate around, which is in user\n    # coordinates relative to the node container. This container will add a compensation for\n    # descenders, so we need to factor that in.\n    center = (options.em_to_px(width) / 2, options.em_to_px(0.5 + svgling.core.NodePos.descender))\n    if sideways and len(text) &gt; 1:\n        # exercise left to reader: arbitrary positioning/sizing for sideways nodes that are &gt; 1 char\n        raise NotImplementedError(\"Sideways rotation requires len(text)==1\")\n    degrees = sideways and 90 or 180\n    svgtext.rotate(degrees, center)\n    svg_parent.add(svgtext)\n    return svgling.core.NodePos(svg_parent, x=50, y=0, width=width, height=1.0, options=options, text=f\"flip_node({text})\")\n\nFor debugging purposes, the return value of one of these objects can be inspected directly (though note that exceptions will not be shown unless you manually call _repr_svg_):\n\nflip_node(\"Table\")\n\n\n\n\n\nsvgling.draw_tree(\"Emoji\", \"(╯°□°)╯\", flip_node(\"(\", sideways=True), flip_node(\"Table\"))"
+    "text": "4.8 Advanced: custom node rendering\nSection 2.2 provided examples of how to use the built-in node builder functions. The svgling package also allows you to define custom node-builder functions, and by doing so, use arbitrary SVG in a tree node, via the svgwrite package. A node-builder function should be decorated with @svgling.core.node_builder and return a svgling.core.NodePos object that has the correct dimensions set (currently, these cannot be inferred from SVG). NodePos is a wrapper class for an arbitrary SVG object using the svgwrite package. The details of constructing SVG diagrams progamattically go somewhat beyond the scope of this manual, and I won’t explain the SVG format or the svgwrite api in detail here. But generally, you will want to construct svgwrite.container.SVG objects that contain svgwrite.text.Text objects, possibly with svgwrite.text.TSpan objects within those.\nSpecific notes on constructing NodePos and the contained svg objects:\n\nMinimally, the returned NodePos should have width and height set (otherwise, they default to 0). These can be set as named parameters to the constructor, or via the set_dimensions function, which also takes them as named parameters.\nIt is also recommended to set text to something readable, so that the object can be inspected without svg rendering.\nx and y can be used to shift position relative to the tree; x=50 centers (and is probably what you want in most cases).\nUser coordinates can be assumed to match px, and for text rendering, unless you explicitly set font size, you should use the provided options value to get font sizing via em (provides a string with units) and em_to_px (provides a number in user coordinates).\nThe options parameter will be filled in when building a tree, but you should allow for direct calls for debugging.\nThe position of 0,0 is relative to a container constructed on top of NodePos. You can assume that it will have the width specified by NodePos, with height specified by NodePos with some extra y space; the below example demonstrates this.\nTips: use debug mode. Draw reference points when testing (e.g. svgwrite.shapes.Circle((0,0), r=3, fill=options.text_color)).\n\nThe following cell provides a small example of implementing a node builder. As you can see, the svg standard is the limit in what you can draw here, but dealing with positioning is overall not entirely trivial. A good node builder will also be responsive to the options provided from a tree context, illustrated in the text settings below.\n\nimport svgwrite\n\n@svgling.core.node_builder\ndef flip_node(text, sideways=False, options=None):\n    if options is None:\n        options = svgling.core.TreeOptions()\n\n    # get the text width in `em`s based on the input string\n    width = options.label_width(text)\n    svg_parent = svgwrite.container.SVG(x=0, y=0, width=\"100%\")\n    # general recipe for setting up an appropriate Text object. We are inheriting\n    # style from the tree other than these.\n    svgtext = svgwrite.text.Text(text, insert=(\"50%\", # x pos at 50%\n                                               svgling.core.em(1, options)), # y pos (baseline) at 1em\n                                               text_anchor=\"middle\", # align text in the middle\n                                               fill=options.text_color, # use options to set fill/stroke\n                                               stroke=options.text_stroke)\n    # the hard part is figuring out the center point to rotate around, which is in user\n    # coordinates relative to the node container. The center position of a line of text\n    # is not simply 0.5em, because the baseline-to-baseline distance includes space for\n    # an ascender, and not space for a descender. In addition, the normal node margin\n    # applies only to the bottom of a node, not the top. Therefore, adjust the center\n    # downwards by approximately the height of a descender, to ensure half a descender\n    # margin on each side.\n    center = (options.em_to_px(width) / 2, options.em_to_px(0.5 + svgling.core.NodePos.descender_margin))\n    if sideways and len(text) &gt; 1:\n        # exercise left to reader: arbitrary positioning/sizing for sideways nodes that are &gt; 1 char\n        raise NotImplementedError(\"Sideways rotation requires len(text)==1\")\n    degrees = sideways and 90 or 180\n    svgtext.rotate(degrees, center)\n    svg_parent.add(svgtext)\n    return svgling.core.NodePos(svg_parent, x=50, y=0, width=width, height=1.0, options=options, text=f\"flip_node({text})\")\n\nFor debugging purposes, the return value of one of these objects can be inspected directly (though note that exceptions will not be shown unless you manually call _repr_svg_):\n\nflip_node(\"Table\")\n\n\n\n\n\nsvgling.draw_tree(\"Emoji\", \"(╯°□°)╯\", flip_node(\"(\", sideways=True), flip_node(\"Table\"))"
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diff --git a/sitemap.xml b/sitemap.xml
index 6cf365d..d2f2759 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -2,22 +2,22 @@
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   <url>
     <loc>https://rawlins.github.io/svgling/index.html</loc>
-    <lastmod>2023-11-11T17:40:10.856Z</lastmod>
+    <lastmod>2024-08-20T14:02:50.562Z</lastmod>
   </url>
   <url>
     <loc>https://rawlins.github.io/svgling/about.html</loc>
-    <lastmod>2023-11-11T17:40:07.154Z</lastmod>
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   </url>
   <url>
     <loc>https://rawlins.github.io/svgling/gallery.html</loc>
-    <lastmod>2023-11-11T17:40:06.495Z</lastmod>
+    <lastmod>2024-08-20T14:02:46.458Z</lastmod>
   </url>
   <url>
     <loc>https://rawlins.github.io/svgling/CHANGELOG.html</loc>
-    <lastmod>2023-11-11T17:40:06.867Z</lastmod>
+    <lastmod>2024-08-20T14:02:46.839Z</lastmod>
   </url>
   <url>
     <loc>https://rawlins.github.io/svgling/manual.html</loc>
-    <lastmod>2023-11-11T17:40:10.386Z</lastmod>
+    <lastmod>2024-08-20T14:02:50.090Z</lastmod>
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 </urlset>