Created attachment 136456 [details] What a PDF looks like in Okular on the down-scaled display SUMMARY As I have my laptop connected to another monitor, I set the zoom for the laptop to 125 % and the monitor to 100 % so the elements on both screens are roughly the same size (as both laptop and monitor have a resolution of 1920x1080). Sadly I cannot put the Okular winodws onto the secondary display (the 100 % scaled one) as it seems that it cannot handle downscaling. STEPS TO REPRODUCE 1. Have 2 monitors/displays 2. Set the zoom for Texts, Apps and Elements for primary display higher than secondary 3. Drag Okular window to secondary display (or open on secondary display directly, that makes no difference) OBSERVED RESULT Text of PDF file is practically unreadable. EXPECTED RESULT Text of PDF file scales down with the window. SOFTWARE/OS VERSIONS Windows: 10 macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION Turning off the option in rendering to smooth the edges makes the text even worse.
Two patches concerning setups with differently-scaled screens have been merged recently https://invent.kde.org/graphics/okular/-/merge_requests/380 https://invent.kde.org/graphics/okular/-/merge_requests/371 and a third one is in the pipeline: https://invent.kde.org/graphics/okular/-/merge_requests/368 Maybe you can try those to see if they fix your problem? Linux people: Plasma Wayland supports per-screen scaling, and I suppose that the bugs you see are mostly the ones recently reported for Windows.