Insert Mode

The key bindings in this mode is the same as in the emacs mode except for the following 4 keys. So, you can move around in the buffer and change its content while you are in insert mode.

ESC

This key will take you back to vi mode.

C-h

Delete previous character.

C-w

Delete previous word.

C-z

Typing this key has the same effect as typing ESC in emacs mode. Thus typing C-z x in insert mode will have the same effect as typing ESC x in emacs mode.