Specify Envelope Contents (New Layout/Report assistant)
In this panel of the New Layout/Report assistant, you place the fields and text that you want to print on each envelope.
Do this
Place fields on the envelope
In Available fields, double-click each field you want, in the order you want them to appear. (Or, select one or more fields, then click Add Field.)
To choose a field from another table, first choose the table from the list of tables, and then place the field. You can also create a new field or table by choosing Manage Database from the list of tables.
Move a field to a new line
In Envelope contents, click to place the insertion point before the field you want to move (before the angle bracket delimiters <<). Then press Enter (Windows) or Return (OS X).
Place text or punctuation between fields
In Envelope contents, click where you want the text or punctuation, then type what you want.
Remove a field from the envelope
In Envelope contents, select the field name and the delimiters (<< and >>), then press Backspace (Windows) or Delete (OS X).
Remove all fields and text from the envelope
Click Clear All.
Important  FileMaker Pro formats fields on an Envelope layout as merge fields. Merge fields are enclosed by double angle bracket delimiters (<< and >>). Make sure to select these brackets along with the field name if you move or delete a field name on the layout. Don't insert punctuation or other text inside the brackets unless it's part of the field name.
Notes and tips
To select more than one field name in the field lists, Shift-click to select contiguous fields. Ctrl-click (Windows) or Command-click (OS X) to select non-contiguous fields.
You can’t enter or edit data using merge fields; use another layout for that purpose.
Related topics 
Creating a layout
Printing envelopes