Improved the Installation guide

_toc.yml

@@ -32,7 +32,7 @@ parts:
           - file: chapter1/topology
           - file: chapter1/space
           - file: chapter1/rules
-      - file: chapter1/poisson 
+      - file: chapter1/poisson
       - file: chapter1/boundary-conditions
       - file: chapter1/geometry
         sections:

chapter1/install.md

@@ -1,56 +1,49 @@
 # Installation
 
-To be able to run the examples in this guide, we recommend to follow these steps:
+To run the examples in this guide, we recommend to follow these steps:
 
-1. Download the [IGA-Python] source files.
+1. Download the [IGA-Python] repository and then install its dependencies.
 
 ```bash
+#  Download IGA-Python
 git clone https://github.com/pyccel/IGA-Python.git
+cd IGA-Python
 
-# Save and show the absolute path to the IGA-Python directory.
-IGA_PYTHON_DIR=$(realpath IGA-Python)
-echo "IGA_PYTHON_DIR=${IGA_PYTHON_DIR}"
-```
-
-2. Create a virtual Python environment.
-
-```shell
+# Install required Python packages
 python3 -m venv iga-python-env
-
-# Save and show the absolute path to the IGA-Python environment script.
-IGA_PYTHON_ENV=$(realpath iga-python-env/bin/activate)
-echo "IGA_PYTHON_ENV=${IGA_PYTHON_ENV}"
-```
-
-2. Install the necessary Python packages.
-
-```shell
-cd ${IGA_PYTHON_DIR}
-
-# Python packages required by IGA-Python will 
-# be installed in IGA-Python virtual environment.
-source ${IGA_PYTHON_ENV}
+source iga-python-env/bin/activate
 pip3 install -r requirements.txt
 ```
 
-3. Launch Jupyter notebook.
+2. Access [IGA-Python] examples through Jupyter notebook.
 
 ```shell
+# Run this command under IGA-Python folder 
 jupyter notebook
 ```
 
-The above command should automatically launch your web browser and show you the [IGA-Python] files you've downloaded from Step 1:
+Running `jupyter notebook` should automatically launch your web browser and show you the files in the current directory—in this case the [IGA-Python] files:
 
 ![png](images/ch1-jupyter-root.png)
 
-Try opening a sample notebook. Navigate to `chapter1/` and find `poisson.ipynb`:
+Try opening a sample notebook, e.g. `chapter1/poisson.ipynb`:
 
 ![png](images/ch1-jupyter-poisson-1.png)
 
 
-Open `poisson.ipynb`. Check that you can successfully run all cells in this notebook. 
+Open `poisson.ipynb` and verify that you can successfully run all cells in this notebook. 
 
 ![png](images/ch1-jupyter-poisson-2.png)
 
 
+3. When you close Jupyter and would like to run the [IGA-Python] examples, just open your Terminal/Console app and run these commands:
+
+```shell
+cd /full/path/to/your/IGA-Python    # Change this to where your IGA-Python folder is located
+source iga-python-env/bin/activate
+jupyter notebook
+```
+
+**Congratulations!** You can now head over to the [Poisson example problem](poisson.ipynb) to get started.
+
 [IGA-Python]: https://github.com/pyccel/IGA-Python.git