"Vex
nnoremap <leader>v :Vex<CR>
nnoremap <leader>h :Sex<CR>
+" this is an auto changer for relative numbers
+:augroup numbertoggle
+: autocmd!
+: autocmd BufEnter,FocusGained,InsertLeave * set relativenumber
+: autocmd BufLeave,FocusLost,InsertEnter * set norelativenumber
+:augroup END