kscreen-doctor

Change and manipulate the screen setup from the command-line. More information: https://invent.kde.org/plasma/libkscreen.

• Show display output information:

kscreen-doctor --outputs

• Set the rotation of a display output with an ID of 1 to the right:

kscreen-doctor {{output.1.rotation.right}}

• Set the scale of a display output with an ID of HDMI-2 to 2 (200%):

kscreen-doctor {{output.HDMI-2.scale.2}}