Specifies the default paper tray to be selected. This value can be any valid tray name for the selected printer, such as Tray 1, Manual Feeder, and so on.

When a printer has a choice of trays (or paper sources), you can check the available tray names by clicking the Configure Windows Printer icon in the Print dialog, which navigates directly to the Windows printer driver's Preferences dialog. In this dialog, you can view/change the printer's layout and Paper/Quality properties, including the paper source.