:^wn
:^ws
:^ww
:^w[hjkl]
:e /home/starlits/.vimrc
:vs
:sp
:20vs
:20sp
:e <filename> vs
:20vs./
<Ctrl>+<w>+<+>
<Ctrl>+<w>+<->
<Ctrl>+<w>+<>>
<Ctrl>+<w>+<<>
^wc
^w_
^w=
20^w_