xrandr
public text v1 · immutable SZ: Pixels Physical Refresh
*0 1280 x 1024 ( 319mm x 255mm ) *60
1 1024 x 768 ( 319mm x 255mm ) 85
2 800 x 600 ( 319mm x 255mm ) 85
3 640 x 480 ( 319mm x 255mm ) 85
Current rotation - normal
Current reflection - none
Rotations possible - normal
Reflections possible - none