Printer Demanding Paper from Tray 1

The printers sometimes insist on having paper in Tray 1 (the pop-out or fold-down tray on the top or side). While this can be caused by a print job formatted for non-standard paper, it can also be caused by printer settings getting "stuck" on Tray 1 selection. If your print jobs repeatedly cause the printer to ask for paper in Tray 1, edit the file .lpoptions in your home directory and remove in references to Tray1 or Tray_1.