Operation • 120DUPLEX PRINTING(PRINTING ON BOTH SIDES OF THE PAPER)• Standard paper sizes only.• Paper weight range 20 to 28 lb. US Bond (75 to 105 g/m² ).• Paper must be loaded print side up.• Only Tray 1, optional Trays 2 and 3, and the High Capacity Feedertrays can be used for duplex printing. The MP tray cannot be usedfor duplex printing.Duplex printing using the PostScript driver1. Open the file in your application and select File Print.2. In the Print dialog box, click the OKI C9x00 PS driver on theGeneral tab, then click the Preferences button.NOTEThe optional duplex unit must be installed in the printer andenabled before duplex printing can be carried out.NOTEThese instructions explain how to change the settings asyou are printing a job. If you wish to change the settings toapply to all jobs:• Click Start Settings Printers and Faxes.• Right click the appropriate printer name, then selectProperties.• Follow steps 3, etc., below. Note that the Propertiesscreen for setting defaults will have more tabs.
