Open the document to print.
Select [Print] on the [File] menu.
Select [Printer Features] in the pop-up menu.
Select [General 2] in [Feature Sets:].
The item names in [Feature Sets:] differ depending on the version of Mac OS X you are using.
Select the fold type in the [Fold Type] pop-up menu.
To fold more than one sheet at a time, enable [Multi-sheet Fold].
Print the document using the print function in the document’s native application.
Fold can be selected only on machines with the optional finisher and multi-folding unit attached.