There doesn’t seem to be one from the docs (with a cursory look) – and all the articles on the topic are like "here are the most useful bindings".
- Common keybindings: https://towardsdatascience.com/jypyter-notebook-shortcuts-bf0101a98330
- Official docs for modifying keybindings: https://towardsdatascience.com/jypyter-notebook-shortcuts-bf0101a98330
- Discussing modifying keybindings in json: https://jupyter-notebook.readthedocs.io/en/stable/extending/keymaps.html?highlight=shortcut#customize-keymaps
P.S The command I’m after is one to vertically center the window (something like zz im vim). This command appears not to be "useful"
Source: Python Questions