How to set up a second monitor in Ubuntu?

Question

ubuntu

Good afternoon,
I have a laptop 15.6 1920x1080, a monitor connected via hdmi 23.8 1920x1080,
on the monitor everything looks too big compared to the laptop, you need to somehow correct it to a single size, I
tried the following
xrandr --output HDMI-1 --scale 1.25x1.25
in different variations of decreasing values, but the clarity drops sharply on the monitor , which of course is not acceptable, how to solve this problem?

Answer 1

You need to use different dpi on monitors
Something like this:

xrandr --dpi 276 --fb 7040x3960 \
    --output eDP-1 --mode 3200x1800 \
    --output DP-1-2 --scale 2x2 --pos 3200x0 --panning 3840x2160+3200+0