--- a/.vimrc	Tue Jan 27 21:17:53 2015 +0800
+++ b/.vimrc	Tue Jan 27 21:18:37 2015 +0800
@@ -67,6 +67,7 @@
 " show column
 nnoremap <F3> :setlocal cursorcolumn! cursorcolumn?<CR>
 imap <F3> <C-O><F3>
+vmap <F3> <Esc><F3>gv
 
 " show listchars
 nnoremap <F4> :setlocal list! list?<CR>