Some updates!
Alt-Tab on Windows overridden
On Windows, we now use Alt-Shift-Down and Alt-Shift-Up to cycle focus between cells.
Alt-Ctrl-Arrow overridden
This was incorrectly documented: it’s Alt-Command-Arrow on both platforms, not Alt-Ctrl-Arrow.
Hope that helps with our Windows support, unfortunately keybindings are kind of a game of battleship, with overlap at the OS, hardware, and software level.
Refer to the Help menu (under your user icon in the top right) and that will show you platform-specific keybindings for editing, as long as you’re on a notebook page.