How to merge two monitors into one and rotate them 90 degrees in ubuntu?

Question

linux

Good afternoon!

There is a computer, it has an NVidia video card with two outputs for two large monitors.
The computer is filled with Ubuntu 20.
The monitors are rotated 90 degrees clockwise and fixed next to each other.
It is necessary to make sure that they are a single whole, i.e. like it's one monitor, not two.
If they were just nearby, then zero problems, BUT, as I wrote above, they stand sideways.

Where to read? Maybe someone already has a solution?
Thank you.

Answer 1

Read the xrandr manual. There you can add / remove monitors, rotate, change resolution.
Write the necessary commands. Then write it all down in the display manager startup script. I don't know what's in ubuntu.
For sddm, this is the /usr/share/sddm/scripts/Xsetup script.
This is how I add a monitor to my laptop.

Answer 2

On Xubuntu, everything is fine through the settings manager. It should be in GNOME as well. Item "Display".