Continuing the discussion from Shortcut for toggle markdown editor/wysiwyg editor:
In mentioned thread a solution is offered which makes you add a keyboard shortcut to the respective json files. Unfortunately this does only work when
- the markdown editor is used (you cannot switch back to the markdown editor with the same command)
- the focus is on the note (and not on the sidebar or the notes lists).
If you do frequently work with both editors a fully functional keyboard command would be very handy.