kscreen-doctor

Change and manipulate the screen setup from the command-line.

TLDR

Show display output information

$ kscreen-doctor --outputs
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Set the rotation of a display output with an ID of 1 to the right

$ kscreen-doctor [output.1.rotation.right]
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Set the scale of a display output with an ID of HDMI-2 to 2 (200%)

$ kscreen-doctor [output.HDMI-2.scale.2]
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Swissborg