We use an HP 9040DN printer for printing invoices. The invoices are sent to the printer via raw PCL. The paper trays are selected in the PCL. Tray 1 is selected for the first page of the invoice, which is a colored page with the company logo. Tray 3 is selected to print the remaining pages. The problem we are having is this. When Tray 1 is empty, we want the printer to switch to the optional source Tray 2, which also contains the colored company logo first page. Is there any way to link trays 1 and 2 or another way to do this?