This dialog appears when you click Insert > Summary on the menu bar, or the Insert Summary button 
on the Insert toolbar, or right-click a DBField and select Summary Function from the shortcut menu. It helps you to insert a selected or newly created summary into a report. See the dialog.
The following are details about options in the dialog:
Summaries
To create a new summary, select <Create...> from the drop-down list; to insert an existing summary into the report, select it from the drop-down list.
Function
Lists functions available for the selected field to be summed on.
Summary On
Displays the field on which the summary is to compute.
Group By
Specifies the field used to group the data. If selected, a summary of each group will be calculated.
Insert
Inserts the selected or newly created summary into the report.
Cancel
Does not retain any changes and closes this dialog.
Help
Displays the help document about this feature.
