ZOOM(1) ZOOM(1)
Feb 1998
NAME
zoom - a simple screen zoomer.
SYNOPSIS
zoom [-H] [-x ulx] [-y uly] [-w width] [-h height] [-m mag] [-d
display] [-t timeout] [-n]
DESCRIPTION
zoom is a very simple screen magnifyer for X. All display depths are
supported and the X Shared Memory extension is used, when possible,
for better performance. If you're server doesn't support XShm (an X-
terminal or AIX 3 perhaps) or you're running over a network (where
XShm just doesn't apply), don't worry, everything will work just fine.
OPTIONS
-H Show a short usage message and exit.
-x ulx, -y uly
Specify the initial upper left corner of the source region.
-w width
Specify the initial source width.
-h height
Specify the initial source height.
-m mag
Specify the initial magnification. The default is 2.
-d display
Specify the display to use.
-n Don't try to use the shared memory extension. By default, the X
shared memory extension will be used if it is available and it
will work (XShm does not work across the network for obvious
reasons).
-t timeout
Specify the titlebar timeout. Various things in zoom use the
titlebar for displaying status message, the timeout is the number
of seconds before the titlebar will revert to its normal state.
COMMANDS
The following keyboard/mouse commands are available when zoom is
running:
+/- Increase/decrease the zoom factor.
d Cycle through the (compiled-in) list of delays; the title bar
will show the new display for a couple seconds and then revert to
normal.
- 1 - Formatted: October 28, 2025
ZOOM(1) ZOOM(1)
Feb 1998
q Quit.
</> Decrease/increase the keyboard scroll step by a factor of two;
the title bar will show the new step for a couple seconds and
then revert to normal.
arrow keys
The arrow keys will move the source region around in the obvious
manner.
mouse
Dragging with mouse button one down will choose a new source
region; you have to start in the zoom window. Mouse button two
will display the color of the pixel under the cursor as a hex RGB
value, the value will appear in the zoom window's titlebar.
SEE ALSO
xzoom(1), xmag(1).
BUGS
Bug reports should be sent to Eric A. Howe (mu@trends.net).
AUTHORS
This program started out as a hack on xzoom by Itai Nahshon
<nahshon@best.com> but it has been hack beyond recognition by Mathew
Francey and Eric Howe. Consider this a complete rewrite.
- 2 - Formatted: October 28, 2025
