+<li>In this dialog:
+<ul>
+<li>select the type of elements which will be extruded (1D or 2D),</li>
+<li>specify the IDs of the elements which will be extruded:
+<ul>
+<li><b>Select the whole mesh, submesh or group</b> activating this
+checkbox; or</li>
+<li>choose mesh elements with the mouse in the 3D Viewer. It is
+possible to select a whole area with a mouse frame; or</li>
+<li>input the element IDs directly in <b>ID Elements</b> field. The selected elements will be highlighted in the
+viewer; or</li>
+<li>apply Filters. <b>Set filter</b> button allows to apply a filter to the selection of elements. See more
+about filters in the \ref selection_filter_library_page "Selection filter library" page.</li>
+</ul>
+</li>
+<li>If the <b>Extrude to Distance</b> radio button is selected</li>
+<ul>
+<li>specify the distance at which the elements will be extruded,</li>
+</ul>
+<li>If the <b>Extrude Along Vector</b> radio button is selected</li>