Sand Box:)

You can see current full path of editing file by >>> CTRL+1+G

In visual mode. If you use V (visual mode) to select multiline, then press : prompt will appear >>>:' So if you need to comment or insert something at first place please do >>>:' s/^/#/ for example above , I need to comment selected multiline. If you want some change with // , then we have to change delimeter, so >>>:' s!^!//! Hahaha, Cool , ha?