+<ol>
+ <li> Draw the \b profile of the extrusion. It can be:
+ <ul>
+ <li> a <a href="create_sketcher_page.html">\b Sketch </a> drawn on a planar face of the object you want to cut.</li>
+ <li> any closed edge or wire of the desired shape (circle, ellipse ...).</li>
+ </ul>
+ </li>