Geografic-Information-System/display/d.zoom/d.zoom.html

<h2>DESCRIPTION</h2>

<em>d.zoom</em> allows the user to interactively adjust the settings 
of the current geographic region using a pointing device such as 
a mouse. 
Like <em><a href="g.region.html">g.region</a></em>, 
<em>d.zoom</em> re-defines the settings of the geographic
region.  However, <em>d.zoom</em> allows the user to change
the current region settings interactively, by either
outlining the new region perimeter with a mouse, unzoom
or pan the region. The graphics display is updated by the module.

<p>
After the user types the command <b>d.zoom</b> a mouse-button menu will appear
directing the user.

<p>
Additionally the region settings can be modified by
running <em><a href="g.region.html">g.region</a></em>. 

<h2>NOTES</h2>

Although it is not necessary that the user display a map in
the active display frame before running <em>d.zoom</em>, it
is helpful to do this for reference. Using parameter <b>-f</b> integrate a 
pan function, <b>-h </b> facilitates the use for handhelds. 

<h2>SEE ALSO</h2>

<em><a href="d.erase.html">d.erase</a></em><br>
<em><a href="d.rast.html">d.rast</a></em><br>
<em><a href="d.vect.html">d.vect</a></em><br>
<em><a href="g.region.html">g.region</a></em>

<h2>AUTHOR</h2>

Michael Shapiro, 
U.S. Army Construction Engineering 
Research Laboratory
<br>
Improvements by Huidae Cho and Markus Neteler

<p><i>Last changed: $Date$</i>