vip: Insert Mode

 
 1.3.3 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.