You can inspect the contents of your report by selecting Inspect from the Report menu of the Report Tester.

This menu option opens an inspector on an AbtVariable, which represents the contents of the Report Viewer in the Report Tester window. The value contained in AbtVariable is your report shell. To open an inspector on the contents of your report shell, select the variable value from the left pane of the inspector and then select Inspect from the Variables menu.