Go to Start > Printers and Faxes
Right click on the printer labled "Regenstein Library BW"
Select Properties > Configure
Check "Duplexing Unit"
To set this as the default:
Right click again on the printer labled "Regenstein
Library BW"
Select Advanced > "Printing Defaults"
Check "Print on Both Sides" / select OK
Select the printer labeled "Regenstein_BW"
Select "Layout" from the drop-down menu
Under two-sided options, select "Long-edge binding"
Click on the Presets menu and choose Save As.
Type in the name Duplex and click OK.
To set this as the default, save the double-sided printing options
under the Standard preset.