1xgamma(1)                   General Commands Manual                  xgamma(1)
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NAME

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

9       xgamma  [-display  display]  [-screen  screen]  [-quiet]  [-gamma f.f |
10       [[-rgamma f.f] [-ggamma f.f] [-bgamma f.f]]]
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DESCRIPTION

13       xgamma allows X users to query and alter the gamma correction of a mon‐
14       itor via the X video mode extension (XFree86-VidModeExtension).
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16       Note  that  the xgamma utility is obsolete and deficient, xrandr should
17       be used with drivers that support the XRandr extension.
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19       If no value for the  gamma  correction  is  given  via  the  -gamma  or
20       -rgamma/-ggamma/-bgamma  options,  xgamma prints the current gamma cor‐
21       rection of the display.
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OPTIONS

24       -display display
25               This argument allows you to specify the server to  connect  to;
26               see X(7).
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28       -screen screen
29               When  multiple displays are configured as a single logical dis‐
30               play, this option allows you to select the screen you  wish  to
31               change.
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33       -quiet  Silence the normal output of xgamma
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35       -help   Print out the `Usage:' command syntax summary.
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37       -gamma f.f
38               The  gamma  correction can either be defined as a single value,
39               or separately for the red,  green  and  blue  components.  This
40               argument specifies the gamma correction as a single value.
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42       -rgamma f.f
43               This  argument specifies the red component of the gamma correc‐
44               tion.
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46       -ggamma f.f
47               This argument specifies the green component of the  gamma  cor‐
48               rection.
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50       -bgamma f.f
51               This argument specifies the blue component of the gamma correc‐
52               tion.
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ENVIRONMENT

55       DISPLAY To get default host and display number.
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BUGS

58       This client changes the internal values of the gamma correction for the
59       Xserver. Whether or not these values are respected depends on the video
60       drivers.
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62       The gamma values are passed to the Xserver with  3  decimal  places  of
63       accuracy.
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SEE ALSO

66       xvidtune(1), xrandr(1)
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AUTHORS

69       Kaleb S. Keithley, X Consortium.
70       David Dawes, David Bateman
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74X Version 11                     xgamma 1.0.5                        xgamma(1)
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