My main monitor is 4K and my secondary monitor is standard 1920x1080. When I open Sumatra on my main screen, and then move the window to my second screen (or create a new Sumatra window and move that one to the other screen), the menu bar and tabs become very large (as if they haven’t scaled based on the resolution change). There are no problems with the document viewing itself, though. I don’t remember this happening in previous versions. I have recently upgraded to v3.2 for Windows. Of course this isn’t necessarily a vital fix, but it would be nice if the top bar didn’t take up so much space relative to the document I’m viewing.
As a sidenote–this software is awesome. Unless I’m doing something very specific/complex with a PDF, this is absolutely my preferred viewer over Adobe. Thank you!