TODO: Change the footer's content in Project Settings : HTML (CHM) Export : Setup HTML Template and Layout
2.1.3.1.11. Supporting Documents
Supporting Documents are any documents that you want to attach to an invoice. They can be documents received before, during and after processing of invoices for approval. Examples can be Purchase Orders, Subcontracts, Packing Slips, Receiving documentation, or any other document you want to attach to an invoice.
In admin, navigate to Maintenance > Supporting Documents Settings