&lt;!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
          "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"&gt;
&lt;para&gt;
Select a region of text by dragging the mouse pointer with the
&lt;mousebutton&gt;left&lt;/mousebutton&gt; mouse button depressed.  Copy the
selected text to a new location by placing the mouse pointer at the
desired position and pressing the &lt;mousebutton&gt;middle&lt;/mousebutton&gt;
button.
&lt;/para&gt;