Some element in Gwenview’s annotate window is not clickable/not working, example: Color, Checkbox for Fill. And also for whatever reason the icons in it were too big, not really the main problem, but I think I should point that out also
Maybe yoy could try a spectacle edit desktop app for the time being, but there’s a good chance the same issue occurs of course since both seem to be the exact same annotation tool. But maybe the prob only occurs in gwenview. Run spectacle -E on a given file and see what gives.