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xgamma(1)							     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 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       Note  that  the xgamma utility is obsolete and deficient, xrandr should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.

       -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 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
       accuracy.

SEE ALSO
       xvidtune(1), xrandr(1)

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

X Version 11			 xgamma 1.0.5			     xgamma(1)
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