Open the document to print.
Select [Print] or [Print...] from the [File] menu.
When using Mac OS X 10.7, select the printer you are using in the [Printer:] pop-up menu.
Select [Layout] from the pop-up menu.
Select [Long-Edge binding] or [Short-Edge binding] from the [Two-Sided:] pop-up menu or [Two-Sided:] area.
Print the document using the print function in the document's native application.