nggg	# move to n lines after
dggg	# delete from the cursor "|" to the end
yggg	# copy from the cursor "|" to the end
d3w     # delete 3 words

nx		# delete n characters after
nX		# delete n characters before

d0		# delete from the cursor "|" to the beginning of the line
d$		# delete from the cursor "|" to the end of the line
y0		# copy from the cursor "|" to the beginning of the line
y$		# copy from the cursor "|" to the end of the line
p		# paste after the current line
P		# paste before the current line

u		# cancel
ctrl+r	# redo
.       # repeat

~		# capitalize
guaw	# de-capitalize
3~		# capitalize 3 characters
g~~		# capitalize line

>ggg    # indent to the end

// macros
qw(action)q  	 # register macros as w 
@w          	 # use macros 
@@           	 # repeat last macros
7@w          	 # use macros 7 times

// visual mode
v				 # visual mode
shift+v			 # visual line
ctrl+v			 # visual block

:e newfile.txt	 # create a new file

:10,20s/word1/word2/g	# 替换10-20行间所有的word1为word2 
:10,Ss/word1/word2/g	# 替换10-最后一行