Install elpa-which-key by entering the following commands in the terminal:
sudo apt update sudo apt install elpa-which-key
Description:
display available keybindings in popup
`which-key' is a minor mode for Emacs that displays the key bindings following your currently entered incomplete command (a prefix) in a popup. For example, after enabling the minor mode if you enter C-x and wait for the default of 1 second the minibuffer will expand with all of the available key bindings that follow C-x (or as many as space allows given your settings). This includes prefixes like C-x 8 which are shown in a different face.
Homepage: https://github.com/justbur/emacs-which-key
Version: 3.1.0-1
Section: universe/lisp