 a frame rate of <code>30000/1001</code>.
</p>
</dd>
<dt>&lsquo;<samp>show_region</samp>&rsquo;</dt>
<dd><p>Show grabbed region on screen.
</p>
<p>If <var>show_region</var> is specified with <code>1</code>, then the grabbing
region will be indicated on screen. With this option, it is easy to
know what is being grabbed if only a portion of the screen is grabbed.
</p>
<p>Note that <var>show_region</var> is incompatible with grabbing the contents
of a single window.
</p>
<p>For example:
</p><div class="example