xrandr can change display orientation, resolution and various other screen settings in X-Windows. * To see avalable options set in /etc/X11/xorg.conf * Execute: xrandr --verbose * output: SZ: Pixels Physical Refresh *0 1024 x 768 ( 347mm x 260mm ) *85 1 800 x 600 ( 347mm x 260mm ) 85 Current rotation - normal Current reflection - none Rotations possible - normal Reflections possible - none Setting size to 0, rotation to normal Setting reflection on neither axis * To change the display resolution to 800x600 * Execute: xrandr -s 800x600 * An alternative way to change settings it to use the number presented by xrandr --verbose * Example: xrandr -s 0 * For: *0 1024 x 768 ( 347mm x 260mm ) *85
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