/*! \page grouping_elements_page Grouping elements In Mesh module it is possible to create groups of mesh elements: nodes, edges, faces, volumes, 0D elements or balls. One group contains elements of only one type. The following ways of creation are possible: - by selecting the elements using filters and/or directly on the presentation in the VTK viewer, and/or by using elements of other mesh objects - \ref standalone_group "Standalone group" tab of \ref creating_groups_page "Create group" dialog. - by creating a group of elements generated on the chosen geometrical object - \ref group_on_geom "Group on geometry" tab of \subpage creating_groups_page "Create group" dialog and \subpage create_groups_from_geometry_page "Create Groups from Geometry" dialog. - by creating a group of elements satisfying to certain criteria - \ref group_on_filter "Group on filter" tab of \subpage creating_groups_page "Create group" dialog. - by creating groups of nodes and elements from the chosen submesh (type of elements depends on dimension of submesh geometry) - using Mesh -> Construct Group menu item (available in context menu as well). - by creating groups of entities from existing groups of superior dimensions - using \subpage group_of_underlying_elements_page "Create Group of Underlying Elements" dialog. The created groups can be later: - \subpage editing_groups_page "Edited" - \subpage using_operations_on_groups_page "Subjected to Boolean operations" - \subpage deleting_groups_page "Deleted" In the Object Browser, if groups or sub-meshes container item has more than one child sub-object, it is possible to sort the children in ascending order. For this, select the parent object in the Object Browser and choose Sort children context menu item. \image html smesh_sort.png "Sorting of sub-objects" An important tool, providing filters for creation of \b Standalone groups and groups On Filter is \ref selection_filter_library_page. */