# command line model.
	esc # shift to normal model.	

	Tab # auto complement.

	split filename # open file by split.
	vsplit filename # open file by vsplit.

	q! # quit.
	x # x == wq, save and quit.
	wq # save and quit.

# normal model.
	i # shift to insert model. 
	: # shift to command line model.

	/ # search word.
	Ctrl + w + h,j,k,l # shift edit window.
	
	$ # jump line tail.
	^ # jump line head.
	G # jump file tail.
	gg # jump file head.
	
	o # down insert one line and into insert model.
	O # up insert one line and into insert model.

	u # undo.
	h,j,k,l # left down up right.	

	number + dd # cut number line.
	yy copy # line
	p # paste
	x # delete ont letter.

# insert model.
	esc # shift to normal model.

## auto complement
	Ctrl + p # 
	Ctrl + n # next item