TileNavElements can be combined into groups. You can specify the name of the group to which the current TileNavElement belongs with the GroupName property.
The following picture shows an example of grouped TileNavElements. The group names Managers and Sellers are displayed above the first TileNavElement of the corresponding group.

To specify the appearance settings used to paint group names, use the TileNavPaneDropDownOptions.AppearanceGroupText property.