vim commands

:registers show register text
"ayy : copy to 'a' register
i<C-r>a : yank from 'a' register
<C-w>r, x : rotate or switch windows
:wall, :qall, :wqall  : write all opened files
v-mode:
  $, aw, o  : select to end, word, top-bottom toggle
  gv : repeat last vmode ope
  ~, v, V : convert word
:set scrollbind, :syncbind