Table of contents 2 is a very useful extension to Jupyter notebook that allows you to have a nested outline with links to all the Markdown headings in a Jupyter notebook. This is basically essential when you’re working with a notebook of any real length. I don’t know why it isn’t just a standard feature in Jupyter.
Figuring out how to install it is a bit annoying as instructions are poorly written across several Github repos, but the process is actually very simple (if a little hacky). Assuming you followed my instructions on setting up a virtual environment in Python 3, activate it with (substitute your own path if needed):
Now install jupyter_contrib_nbextensions. This bundles a bunch of extensions to Jupyter, as well as a configuration panel that will be added to the Jupyter interface.
pip install jupyter_contrib_nbextensions
This command is needed to complete the installation of the extensions to Jupyter itself:
jupyter contrib nbextension install --user
Now on the main Jupyter page, click the tab “Nbextensions”, then check the box for “Table of contents (2)”.
Now when you start a notebook, click the “Table of Contents” button, and you’ll get a sidebar on the left with your table of contents. Voila!