This extension adds keybindings for two types of commands. The first type is vim-like keybindings for existing Jupyterlab commands. Such as O for insert cell below which uses the notebook:insert-cell-below command. The second kind are for Jupyterlab commands provided by this extension. These commands are prefixed with vim:, e.g. vim:select-below-execute-markdown.
Both types of commands be modified the same way you modify other jupyterlab shortcuts (aka keybindings) via Settings > Advanced Settings Editor > Keyboard Shortcuts
For a complete listing of the keyboard shortcuts set by this extension see the plugin.json under the schema folder.
If you have a keybinding that you would like to add to your jupyterlab then you can use the following selectors to be active in different states of the notebook
Jupyterlab Command Mode
.jp-NotebookPanel[data-jp-vim-mode='true'] .jp-Notebook:focus
You can use any of the standard jupyterlab selectors. The only extension specific component is the [data-jp-vim-mode='true'] on the notebookpanel selector, this will make it so that a keybinding is active only when vim mode is active.
In a cell - Normal mode or Insert Mode Jupyterlab commands don't know about the concept of vim modes so they will be active no matter what vim state the editor is in.
.jp-NotebookPanel[data-jp-vim-mode='true'] .jp-Notebook.jp-mod-editMode
Vim style remappings (inoremap, imap, nmap...) can be modified in the Settings Editor under the Notebook Vim settings. Alternatively, for JupyterLab <4 you can use the sibling extension jupyterlab-vimrc to do this.
With either approach, Vim remappings do not work with everything you may have in your standard vimrc. Jupyterlab uses [Codemirror] for the editors in cells. This extension adds vim support by enabling the vim emulation in codemirror. While this comes with partial support for remappings in your vimrc the support is incomplete. In particular, keybindings which use noremap don't work unless the keybinding already exists in the default Codemirror Vim keybindings. If your keybinding doesn't work with noremap, try using map, and above all, avoid recursive remappings.