magnify parts of the screen
xmag [option ... ]
The xmag program allows you to magnify portions of the screen.
If no explicit region is specified, a square centered around the
pointer is displayed indicating the area to be enlarged.
Once a region has been selected, a window is popped up showing
a blown up version of the region in which each pixel in the
source image is represented by a small square of the same color.
Pressing Button1 on the pointer in the enlargement window pops
up a small window displaying the position, number,
and RGB value of the pixel under the pointer until
the button is released.
Pressing the space bar or any other pointer button removes
the enlarged image so that another region may be selected.
Pressing ``q'', ``Q'', or ``^C'' in the
enlargement window exits the program.
This option specifies the X server to use for both reading the screen and
displaying the enlarged version of the image.
This option specifies the size and/or location of the enlargement window.
By default, the size is computed from the size of the source region
and the desired magnification. Therefore, only one of
-source size and
-mag magfactor options may be specified if
a window size is given with this option.
This option specifies the size and/or location of the source region on the
screen. By default, a 64x64 square centered about the pointer is provided
for the user to select an area of the screen. The size of the source is used
with the desired magnification to compute the default enlargement window
size. Therefore, only one of -geometry size and
-mag magfactor options may be specified if a
source size is given with this option.
This option specifies an integral factor by which the source
region should be enlarged. The default magnification is 5.
This is used with the size of the source to compute the default
enlargement window size. Therefore, only one of
-geometry size and -source
geom options may be specified if a magnification factor is
given with this option.
This option specifies the width in pixels of the border
surrounding the enlargement window.
This option specifies the color to use for the border
surrounding the enlargement window.
This option specifies the name of the color to be used as the background
of the enlargement window. If the name begins with a percent
size ``%'', it is interpreted to be an absolute pixel value.
This is useful when displaying large areas since pixels that
are the same color as the background do not need to be painted
in the enlargement. The default is to use the BlackPixel of the screen.
This option specifies the name of a font to use when displaying pixel values
(used when Button1 is pressed in the enlargement window).
This option indicates that the server should be grabbed during the dynamics
and the call to XGetImage. This is useful for ensuring that clients don't
change their state as a result of entering or leaving them with the pointer.
The xmag program uses the following X resources:
geometry (class Geometry)
Specifies the size and/or location of the enlargement window.
source (class Source)
Specifies the size and/or location of the source region on the screen.
magnification (class Magnification)
Specifies the enlargement factor.
borderWidth (class BorderWidth)
Specifies the border width in pixels.
borderColor (class BorderColor)
Specifies the color of the border.
background (class Background)
Specifies the color or pixel value to be used for the background of the
font (class Font)
Specifies the name of the font to use when displaying pixel values when the
user presses Button1 in the enlargement window.
This program will behave strangely on displays that support windows of
Because the window size equals the source size times the magnification, you
only need to specify two of the three parameters. This can be confusing.
Being able to drag the pointer around and see a dynamic display
would be very nice.
Another possible interface would be for the user to drag out the desired
area to be enlarged.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003