This tip provides a function (SetDiffEnviron) to set the "diff" environment in buffer. So, if you want to diff the right and the left window, you have to run :SetDiffEnviron into the right and the left buffer. Add the following to your vimrc file: function! SetDiffEnviron() set diff set scrollbind set scrollopt=ver,jump,hor set nowrap set fdm=diff endfunction :command! SetDiffEnviron call SetDiffEnviron()