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I have a 15 inch latptop with a 4K built-in display (3840x2160) connected to a 1440p external monitor (2560x1440). From the Display settings, I applied a Scale for menu and title bars of 2 on the built-in display and 1 on the external one.

From this point, the window contents is huge on my external monitor because I use Scale all window contents to match: Display with largest controls. Changing this settings makes windows content tiny and not readable.

Is there a way to have different window contents scale per display ?

Thank you.

2
xrandr

will show your available monitors and resolutions. then use for example :

xrandr --output HDMI1 --scale 2x2 --mode 1920x1200 --fb 3840x4200 --pos 0x0
xrandr --output eDP1 --scale 1x1 --pos 320x2400
  1. --output HDMI1 in this case is the external screen, eDP1 is the laptop screen.
  2. --scale 2x2 - make everything on external screen twice smaller
  3. --mode XxY - explicitly set the resolution for screen (not necessary if is already set)
  4. --fb XxY - set size of a virtual screen (framebuffer) (important without this, you will be able to use only a fourth part of the
    screen). In my case one screen was on top of another, so I added up effective heights 2400+1800=4200. Also note, that maximum framebuffer size might be specified in xorg.conf - then you cannot exceed it (it is written in the first line of xrandr -q output).
  5. --pos XxY - in this case I set absolute positioning of the screens, so the laptop screen is directly on the bottom of the external sceen.

this guide found here. does it help ?

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