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zoom(6)			      XScreenSaver manual		       zoom(6)

NAME
       zoom - wander around magnified desktop

SYNOPSIS
       zoom  [-display	host:display.screen]  [-foreground color] [-background
       color] [-window] [-root] [-mono] [-install]  [-visual  visual]  [-delay
       usecs]  [-duration  secs] [-lenses] [-pixwidth pixels] [-pixheight pix‐
       els] [-pixspacex	 pixels]  [-pixspacey  pixels]	[-lensoffsetx  pixels]
       [-lensoffsety pixels] [-fps]

DESCRIPTION
       The  zoom  program takes an image, magnifies it, and scrolls around it,
       fatbits-style.

       The image that it manipulates will be grabbed from the portion  of  the
       screen underlying the window, or from the system's video input, or from
       a random file on disk, as indicated by the grabDesktopImages, grabVide‐
       oFrames,	 and  chooseRandomImages  options in the ~/.xscreensaver file;
       see xscreensaver-demo(1) for more details.

OPTIONS
       zoom accepts the following options:

       -window Draw on a newly-created window.	This is the default.

       -root   Draw on the root window.

       -mono   If on a color display, pretend we're on a monochrome display.

       -install
	       Install a private colormap for the window.

       -visual visual
	       Specify which visual to use.  Legal values are the  name	 of  a
	       visual  class,  or the id number (decimal or hex) of a specific
	       visual.

       -delay microseconds
	       Slow it down.

       -duration seconds
	       How long to run before loading a new image.  Default  120  sec‐
	       onds.

       -lenses Instead	of  doing  magnification we just copy an offset region
	       from the original image.	 If lensoffsetx < pixwidth (and	 simi‐
	       larly  for Y) then consecutive regions will overlap, giving the
	       effect of looking through an array of lenses.

       -pixwidth pixels
	       Width of the magnified pixels.

       -pixheight pixels
	       Height of the magnified pixels.

       -pixspacex pixels
	       Amount of black space between magnified pixels (X direction).

       -pixspacey pixels
	       Amount of black space between magnified pixels (Y direction).

       -lensoffsetx pixels
	       Distance in X  direction	 between  consecutive  copied  regions
	       (only effective when -lenses used).

       -lensoffsety pixels
	       Distance	 in  Y	direction  between  consecutive copied regions
	       (only effective when -lenses used).

       ENVIRONMENT

       DISPLAY to get the default host and display number.

       XENVIRONMENT
	       to get the name of a resource file that	overrides  the	global
	       resources stored in the RESOURCE_MANAGER property.

SEE ALSO
       X(1), xscreensaver(1), xscreensaver-demo(1), xscreensaver-getimage(1)

COPYRIGHT
       Copyright  ©  2000 by James Macnicol.  Permission to use, copy, modify,
       distribute, and sell this software and its documentation for  any  pur‐
       pose  is	 hereby granted without fee, provided that the above copyright
       notice appear in all copies and that both  that	copyright  notice  and
       this  permission	 notice appear in supporting documentation.  No repre‐
       sentations are made about the suitability of this software for any pur‐
       pose.  It is provided "as is" without express or implied warranty.

AUTHOR
       James Macnicol <james.macnicol@mailexcite.com>, 20-Nov-2000.  Much code
       was shamelessly stolen from the spotlight hack and a few others.

X Version 11		      5.07 (10-Aug-2008)		       zoom(6)
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