+<em>"Clear Mesh Data" button</em></center>
+
+\note This command works in a different way in different situations: <ul>
+ <li> if the mesh is computed on a geometry, then "Clear Mesh Data" removes
+ all elements and nodes.</li>
+ <li> if the mesh is not based on a geometry (imported, compound, created from
+ scratch etc), then "Clear Mesh Data" removes only the elements and
+ nodes computed by algorithms. If no such elements or nodes have been created, can remove nothing.</li></ul>