There are two types of keybindings available. Emacs mode and Vi mode. The keybindings can be changed via the config file (~/.config/pgcli/config) or toggled via F4 key.

Emacs mode is the default. In emacs mode you can press Ctrl-a to go to the beginning of a line and Ctrl-e to go to the end of a line and many more.

When Vi mode is enabled you can use modal editing features offered by Vi in the REPL command line. For instance, press [Esc] key to go to normal mode and you can use ^ to go to the beginning and $ to go to the end of a line. Pressing i will drop you into the insert mode.