Adding a layout part
To add a layout part to a layout, first decide what kind of part you need and where it should go.
If you're defining a subsummary part that summarizes a set of records, you also choose what field to group or sort the layout by (the break field). Finally, you define how the part affects page breaks and page numbering, as well as any background fill for the part.
To add a layout part:
In Layout mode, drag the Part tool Part tool in the status toolbar to the layout.
See About layout part types for a description of each part type.
Part types that are already on the layout are dimmed. (Only subsummary parts can exist more than once on a layout.)
If you're adding a subsummary part, after you click Sub-summary when sorted by, select the name of the field that you want to group the records by (the break field).
You can choose a field in another table by first choosing a table name from the tables list above the list of fields.
When the records are sorted by the break field, all records with the same value in that field are grouped so that FileMaker Pro can calculate subsummary data. (For example, if you wanted to subtotal sales figures for each region, the break field would be Region.) See Troubleshooting layouts with summary or subsummary parts.
You can also add a part by choosing Insert menu > Part in Layout mode.
If you choose Layouts menu > Part Setup to create a subsummary part, you are prompted to specify whether you want summary information to print above or below the records being summarized.
Related topics 
Changing a layout part
Deleting layout parts
Reordering layout parts
Resizing layout parts