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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  monitor
     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     Note  that  the  xgamma utility is obsolete and deficient, xrandr should be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 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.

     -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	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 correc-
	     tion.

     -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  accu-
     racy.

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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