mobile
w/W: move to the beginning of the next word
e/E: move to the end of the next word
b/B: move to the beginning of the word
gg: move to the beginning of the file
G: move to the end of the file
^U: turn up Page
^D: Page up
edit
o: Insert row below
O: Insert row above
dd: Delete row
cc: Clear current row and enter insert mode
copy and paste
yy: copy the current line
p: paste to the appropriate position behind the cursor
Key combination
d+X
c+X: delete and enter insert mode
y+X
select
v: enter visual mode
V: enter visual mode, and select by line
^v: enter visual mode, and select by block
other
~: Convert case
count
Number + key combination: execute several times
Modifier
a：around
i：inside