redhat man page for xgamma

xgamma(1)						      General Commands Manual							 xgamma(1)

NAME
       xgamma - Alter a monitor's gamma correction for XFree86

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 XFree86 X server video mode extension (XFree86-VidMode-
       Extension).

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

       -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. If no value for the gamma correction is given xgamma returns the current gamma
	       correction of the display.

       -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

XFree86 						       Version Version 4.3.0							 xgamma(1)