To print double-sided, click on the “Properties...” button in the Print dialog box.
Then, choose the Layout tab, as shown on the right. With the “Print on Both Sides:” option, you can choose to flip the paper on the long or short edge.
When using an OIT cluster printer, double-sided printing should already be the default option. If you need the set the default option to duplex, begin by opening the Control Panel from the Start menu. In Vista, choose “Printer” under Hardware and Sound. In Windows XP, choose “Printers and Other Hardware”, then choose “Printers and Faxes.”
Then, select the printer whose default setting you wish to change. In Vista or Windows XP, click on “Select printing preferences”. Printing Preferences can also be reached by right-clicking on the printer. You will see the printer properties as shown in Step 2, above. Finally, set the desired double-sided printing option and click OK.