diff --git a/.verify-helper/docs/static/base.css b/.verify-helper/docs/static/base.css
index b167f05..18ed6d6 100644
--- a/.verify-helper/docs/static/base.css
+++ b/.verify-helper/docs/static/base.css
@@ -7,7 +7,6 @@ html,
 code {
     font-family: 'Jetbrains Mono', ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
     font-variant-ligatures: none;
-    font-size: 7.5pt;
 }
 
 pre {
@@ -141,7 +140,9 @@ td, th {
 .token.selector .token.attribute {
 	color: #001575;
 }
-
+.content {
+    break-before: avoid;
+}
 .content-md {
     font-family: sans-serif;
 }
diff --git a/.verify-helper/docs/static/notebook.css b/.verify-helper/docs/static/notebook.css
index d280b10..0b7d11e 100644
--- a/.verify-helper/docs/static/notebook.css
+++ b/.verify-helper/docs/static/notebook.css
@@ -6,6 +6,10 @@ code {
     font-size: 7.4pt;
 }
 
+nav#toc {
+    break-after: column;
+}
+
 @media print {
     body {
         column-count: 2;
diff --git a/.verify-helper/docs/static/notebook.pdf b/.verify-helper/docs/static/notebook.pdf
index 6ae55f8..432d469 100644
Binary files a/.verify-helper/docs/static/notebook.pdf and b/.verify-helper/docs/static/notebook.pdf differ
diff --git a/build/base.css b/build/base.css
index b167f05..18ed6d6 100644
--- a/build/base.css
+++ b/build/base.css
@@ -7,7 +7,6 @@ html,
 code {
     font-family: 'Jetbrains Mono', ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
     font-variant-ligatures: none;
-    font-size: 7.5pt;
 }
 
 pre {
@@ -141,7 +140,9 @@ td, th {
 .token.selector .token.attribute {
 	color: #001575;
 }
-
+.content {
+    break-before: avoid;
+}
 .content-md {
     font-family: sans-serif;
 }
diff --git a/build/build.js b/build/build.js
index 3b1a371..58ae25d 100644
--- a/build/build.js
+++ b/build/build.js
@@ -3,6 +3,7 @@ const teamname = "tatyam/ICPC_notebook";   // チーム名 + 大学名 (各ペ
 const fontsize = "7.4pt";       // フォントサイズ
 const orientation = "portrait";     // portrait (縦長) / landscape (横長)
 const num_columns = 2;          // 何段組みか
+const break_after_toc = "column"; // toc の後に : page (改ページする) / column (改段する) / auto (強制しない)
 const section_order = ["template", "data-structure", "math", "modint", "FPS", "graph", "graph/tree", "flow", "string", "algorithm", "geometry", "memo"];   // src/* のフォルダを読み出す順序
 
 
@@ -129,6 +130,10 @@ code {
     font-size: ${fontsize};
 }
 
+nav#toc {
+    break-after: ${break_after_toc};
+}
+
 @media print {
     body {
         column-count: ${num_columns};
diff --git a/build/notebook.css b/build/notebook.css
index d280b10..0b7d11e 100644
--- a/build/notebook.css
+++ b/build/notebook.css
@@ -6,6 +6,10 @@ code {
     font-size: 7.4pt;
 }
 
+nav#toc {
+    break-after: column;
+}
+
 @media print {
     body {
         column-count: 2;
diff --git a/notebook.pdf b/notebook.pdf
index 6ae55f8..432d469 100644
Binary files a/notebook.pdf and b/notebook.pdf differ