JupyterLab
Make the Markdown cell a level one heading
Press 1 to make the Markdown cell a level one heading in JupyterLab. The keys are the same on a Mac. It works in the browser version.
Where it works: Markdown cell, command mode
Every documented variant
| System | Environment | Keys |
|---|---|---|
| Mac | Web app | 1 |
| Windows | Web app | 1 |
Where this comes from
JupyterLab shortcut schemas - jupyterlab/jupyterlab
Documentation checked on 2026-09-14. That is a documentation review, not a test run inside the application.