xgamma(1) UNIX Programmer's Manual xgamma(1)
xgamma - Alter a monitor's gamma correction for XFree86
xgamma [-display display] [-screen screen] [-quiet] [-gamma
f.f | [[-rgamma f.f] [-ggamma f.f] [-bgamma f.f]]]
xgamma allows X users to query and alter the gamma correc-
tion of a monitor via the XFree86 X server video mode exten-
sion (XFree86-VidModeExtension).
-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.
-gamma f.f
The gamma correction can either be defined as a sin-
gle 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.
DISPLAY To get default host and display number.
This client changes the internal values of the gamma correc-
tion for the Xserver. Whether or not these values are
XFree86 Version 4.5.0 1
xgamma(1) UNIX Programmer's Manual xgamma(1)
respected depends on the video drivers.
The gamma values are passed to the Xserver with 3 decimal
places of accuracy.
xvidtune(1)
Kaleb S. Keithley, X Consortium.
David Dawes, David Bateman
XFree86 Version 4.5.0 2
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