As my laptop has a 13" display with 3200x1800px I use the --scale option of xrandr to scale it down to 66% (2112x1188px). I used to set this in /etc/sddm/Xsetup: xrandr --output eDP-1 --mode 3200x1800 --scale 0.66x0.66 now with kscreen 5.18.0 these scaling factor is resetted on startup and once it configures a newly connected/disconnected (external) screen. furthermore it would be really nice if the gui would allow to enter these scaling factor per screen SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon User Edition 5.18.0 KDE Plasma Version: 5.18.0 KDE Frameworks Version: 5.67.0 Qt Version: 5.13.2
*** This bug has been marked as a duplicate of bug 417490 ***