/*! \page grouping_elements_page Grouping elements In Mesh module it is possible to \subpage creating_groups_page "create groups of mesh elements": nodes, edges, faces or volumes: <ul> <li> by selecting the elements of the specified kind by their IDs or directly on the presentation in the VTK viewer - <b>Standalone group</b> tab of <b>Create group</b> dialog.</li> <li> by creating a group of elements of the selected type from all such elements of the chosen geometrical object - <b>Group on geometry</b> tab of <b>Create group</b> dialog.</li> <li> by creating several groups of elements (nodes, edges, faces and volumes) from the chosen submesh - using <b>Mesh -> Construct Group</b> Menu item. In this case groups of elements are created automatically.</li> </ul> The created groups can be later: <ul> <li>\subpage editing_groups_page "Edited"</li> <li>\subpage using_operations_on_groups_page "Subjected to Boolean operations", or</li> <li>\subpage deleting_groups_page "Deleted"</li> </ul> An important tool, providing filters for creation of \b Standalone groups is \subpage selection_filter_library_page</li>. */