x11r4 man page for xgamma

xgamma(1)						      General Commands Manual							 xgamma(1)

NAME
       xgamma - Alter a monitor's gamma correction through the X server

SYNOPSIS
       xgamma [-display display] [-screen screen] [-quiet] [-gamma f.f | [[-rgamma f.f] [-ggamma f.f] [-bgamma f.f]]]

DESCRIPTION
       xgamma allows X users to query and alter the gamma correction of a monitor via the X video mode extension (XFree86-VidModeExtension).

       If no value for the gamma correction is given via the -gamma or -rgamma/-ggamma/-bgamma options, xgamma prints the current gamma correction
       of the display.

OPTIONS
       -display display
	       This argument allows you to specify the server to connect to; see X(7).

       -screen screen
	       When multiple displays are configured as a single logical display, this option allows you to select the screen you wish to change.

       -quiet  Silence the normal output of xgamma

       -help   Print out the `Usage:' command syntax summary.

       -gamma f.f
	       The gamma correction can either be defined as a single value, or separately for the red, green and blue components.  This  argument
	       specifies the gamma correction as a single value.

       -rgamma f.f
	       This argument specifies the red component of the gamma correction.

       -ggamma f.f
	       This argument specifies the green component of the gamma correction.

       -bgamma f.f
	       This argument specifies the blue component of the gamma correction.

ENVIRONMENT
       DISPLAY To get default host and display number.

BUGS
       This  client  changes the internal values of the gamma correction for the Xserver. Whether or not these values are respected depends on the
       video drivers.

       The gamma values are passed to the Xserver with 3 decimal places of accuracy.

SEE ALSO
       xvidtune(1)

AUTHORS
       Kaleb S. Keithley, X Consortium.
       David Dawes, David Bateman

X Version 11							   xgamma 1.0.2 							 xgamma(1)