Xerox DocuPrint N4525 User Manual page 71

At the printer:
If your printer driver doesn't include duplex mode, you can select it on
the printer's control panel. However, all jobs sent to the printer are
then double-sided unless they are sent using a printer driver that
specifically says to print the job single-sided. (The driver setting
always overrides the control panel setting.)
8.
On the Xerox DocuPrint N4525 control panel, select duplex
printing:
a.
Press the Menu keys (labeled 1 or 5) to scroll to the
Menu.
b.
Press the Item keys (labeled 2 or 6) to scroll to Duplex.
c.
Press the Value keys (labeled 3 or 7) to scroll to either
Long Edge or Short Edge. Refer to the figure on page 58 to
determine this value.
d.
Press the Enter key (labeled 4).
e.
Press the On Line key (labeled 0) to exit the menus.
User Guide
System
57