Test to see if nostr has more linux people than Twitter:

Is there a linux photo editor that lets you a/b compare images? Specifically what I want to do is be able to hotkey a "master" photo that I can overlay/dismiss with a tap of the spacebar or whatever while browsing a directory of different (but similar) images. This is to say I always want the hotkey to overlay the same image (the "A" image), but the comparison ("B" image) gets replaced by left/right pgup/pgdown whatever as I browser the directory.