I have been trying for a few days to set the display scale higher on my Raspberry Pi 4B using Manjaro Arm 64bit (sway version), because the font size is really small at 3840x2160 on a Samsung 7 series 4k smart TV, to which I have the Raspberry Pi 4B connected, and I barely can distinguish the characters.
I tried wdisplays utility which does the trick, although temporarily, since it does not save the configuration and I must manually set it again on every reboot, with the mentioned utility.
I also tried xrandr but it does nothing. Neither does lrandr nor arandr.
Tweaking /boot/config.txt has not helped either.
If you have any suggestions, please let me know.
Thank you all very much in advance.