XRandR is used to configure which display ports are enabled (e.g. LCD, VGA and DVI), and to configure display modes and properties such as orientation, reflection and DPI.

zarfy

LxRandr

Grandr

ConfigureExtraDisplay

Video Video Index

http://www.thinkwiki.org/wiki/Xorg_RandR_1.2

http://www.xfree86.org/current/xrandr.1.html

http://wiki.debian.org/XStrikeForce/HowToRandR12

Scaling with Panning bug