Top Page > PostScript 3 > Mac OS X Configuration > Printing Documents > Printing on Both Sides of Sheets
Open the document to print.
Select [Print] on the [File] menu.
Select [Layout] in the pop-up menu.
Select [Long-Edge binding] or [Short-Edge binding] in the [Two-Sided:] pop-up menu or [Two-Sided:] area.
Print the document using the print function in the document's native application.