The Group Tree view can be shown or hidden using Toggle Group Tree 
on the toolbar. When the Group Tree view is active , you can drill down on groups to view the details of the underlying data.
The Group Tree view presents a split screen:
- The right pane displays the report
- The left pane displays a high level outline of the report, showing the hierarchy of groups and subgroups in a familiar tree format.
The Group Tree normally displays the names of the groups and subgroups you created in your report. When you click the tree node for the group that interests you, the program jumps immediately to the part of the report that contains the information for that group. For longer reports or reports in which you wish to jump back and forth between different groups, the navigation features of the Group Tree view make your work extremely efficient.