There could be situation with very lengthy diffs for some file in particular commit. (For example feature is added and big new file is added with small integrations to other files.) It would be useful to improve UI to let it jump between files in diff panel of main view.

For example, with ctrl- or alt- + -up or -down arrow would move diff frame to a next file.

Currently it's possible to move cursor in diff panel with j/k to a filename (that require very many keypresses to scroll pass commit message and formatting) then enter to the filename and it jumps to a diff part for that file, then it is not possible to return or select next file. Jump with one keypress would be a lot handier.

Action names could be scroll-next-file/scroll-prev-file

Additionally, with this feature it would be useful to enable diff view for merge commits as we could easily navigate through it.