https://lem-project.github.io/lem-page/usage/usage/

The documentation is in progress. You can find a list of available keys and commands in keybindings, and you can get this list in Lem itself with M-x documentation-describe-bindings (new after Lem 2.0). Lem Manual for Users Lem has Emacs-like keybindings, as well as a vi emulation (M-x vi-mode). So, to open a file, press C-x C-f (you get the file selection dialog shown above). To save it, it’s C-x C-s.