I have a Mac Mini connected to two Dell U2515H monitors, which have 2560x1440 resolution.
Problem: everything (macOS UI elements) is too small at this native resolution.
I was able to force "HiDPI" mode, using the command below.
sudo defaults write /Library/Preferences/com.apple.windowserver.plist DisplayResolutionEnabled -bool true
The result looks nice and sharp, BUT everything is too big when using the 1280x720 HiDPI resolution.
What I need is a scaling in between these 2 options (100% and 200%).
It seems that macOS has this option (several levels of scaling available) on their iMacs and MBPs:
Is there a trick to enable this slider with my monitors?