lay name.
</p>
<p><var>x_offset</var> and <var>y_offset</var> specify the offsets of the grabbed
area with respect to the top-left border of the X11 screen. They
default to 0.
</p>
<p>Check the X11 documentation (e.g. <code>man X</code>) for more detailed
information.
</p>
<p>Use the <code>xdpyinfo</code> program for getting basic information about
the properties of your X11 display (e.g. grep for &quot;name&quot; or
&quot;dimensions&quot;).
</p>
<p>For example to grab from &lsquo;<tt>:0.0</tt>&rsquo; using