Honestly, if you already use powerline or familiar extension, you can look at the status bar for the absolute line. I find it's no need for changing between mod

Honestly, if you already use powerline or familiar extension, you can look at the status bar for the absolute line. I find it's no need for changing between modes. And if you use Mac OSX and latest vim version installed by homebrew, in relative line number mode of vim, instead of 0 it is the row line number.