vim

navigation

u              undo
ctrl+R         redo
shift+G        go to last line

visual mode commenting

• https://stackoverflow.com/questions/1676632/whats-a-quick-way-to-comment-uncomment-lines-in-vim

comment

go to first line/
esc/
ctrl+v/
down arrow to last line/
shift+i/
#/
esc/
wait/
esc

uncomment

go to first line/
esc/
ctrl+v/
down arrow to last line/
x

EOF