mac notebook Edit Text command

Supplement a vi command: 

1. In the default Press i "command mode" and enter the edit mode 
2. In the non-return to command mode command mode Press ESC 
3. In the "command mode" Input: 
   : W save the current file 
   and: q editing, if the file is saved with a forced mode requires 
   :! Q forced to exit without saving changes 
   : wq combined instruction, save and exit 
4. In the movement "command mode": 
   H left 
   at j 
   the K 
   L Right 

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