On the Grouped fields tab you can select grouping fields and grouping type.

Fig. 154. Grouped fields in a report item

A grouping can have one of the following types:

• Elements. A group only includes nonhierarchical records (items).
• Hierarchy. A group includes both hierarchical and nonhierarchical records (items and folders).
• Hierarchy only. A group only includes hierarchical records (folders).

You can use the menu to add a new field or a new auto field.