Invoice with images of receipts for billable expenses

I have uploaded scans of receipts for each billable expenses being pulled into “Payments” via my bank account. When I generate the Invoice via “Customers”, is there anyway to automatically append each receipt image so that I can send it all as one, rather than having to generate a PDF from the original scans?

Not sure how you do that, there is no “Create Sales Invoice” in the Customers tab. Manager can only attach receipts and other documents not append (merge) them into the Sales Invoice. The only way to attach one or many receipts images and any other documentation such PDF, XLS, and DOC to a Sales Invoice is manually in the View screen, see below: