In general, one time onformation at the top of the invoive such as customer name, address, etc in in the group header (you group by invoice).
Summary informatinon such as total before tax, tax, freight, etc in in the group footer.
Detail information such as item, description, unti rpice, extended unit price, etc are in the details section.
Beyond this general approach, I do not know how to help you.
Software Sales, Training and Support for Macola, Crystal Reports and Goldmine
dgilsdorf@mchsi.com