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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] [-version] [-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 mon-
       itor via	the X video mode extension (XFree86-VidModeExtension).

       Note that the xgamma utility is obsolete	and deficient,	xrandr	should
       be used with drivers that support the XRandr extension.

       If  no  value  for  the	gamma  correction  is  given via the -gamma or
       -rgamma/-ggamma/-bgamma options,	xgamma prints the current  gamma  cor-
       rection 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  dis-
	       play,  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.

       -version
	       Print out the program version and exit.

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

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

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

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

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 ac-
       curacy.

SEE ALSO
       xvidtune(1), xrandr(1)

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

X Version 11			 xgamma	1.0.7			     xgamma(1)

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