In this dialog box you should specify:
<ul>
<li>the type of elements which will be extruded (1D or 2D),</li>
-<li>specify the IDs of the elements which will be revolved by
-selecting them in the 3D viewer or select the whole mesh or
-submesh,</li>
+<li>specify the IDs of the elements which will be revolved
+<ul>
+<li>Check on <b>Select the whole mesh, submesh or group</b> option
+<li>Choosing them manually with the mouse in the 3D Viewer. You can
+click on an element in the 3D viewer and it will be highlighted</li>
+<li>Applying Filters. The <b>Set filter</b> button allows to apply a
+definite filter to selection of the elements. See more
+about filters on the
+\ref selection_filter_library_page "Selection filter library" page.</li>
+</ul>
+</li>
<li>specify the axis (point and vector) around which the elements will
be revolved,</li>
<li>angle of rotation and number of steps,</li>
<br><b>See Also</b> a sample TUI Script of a
\ref tui_revolution "Revolution" operation.
-*/
\ No newline at end of file
+*/
