The following dialog box will appear:
\image html extrusion1.png
+
+\image html extrusion2.png
</li>
<li>In the dialog box you should:
<li><b>Start node</b> - the first or the last node on the edge. It is used to define the direction of extrusion </li>
</ul>
</li>
+<li> <b>Generate Groups</b> checkbox allows copying the groups of
+elements of the source mesh to the newly created one. </li>
</ul>
</li>
