<li>In this dialog:
<ul>
+ <li>Use \a Selection button to specify what you are going to
+ select at a given moment, \b Nodes, \b Edges or \b Faces.
+ \image html image120.png
+ <center><em>"Selection" button</em></center>
+ </li>
<li>Specify \b Nodes, \b Edges and \b Faces, which will be extruded, by one
of following means:
<ul>
