HP Color LaserJet 4500 Printer series - Manual (Page 70)

70 Common Printing Tasks
EN
Using the Duplex Printing Accessory for
Two-Sided Printing
The optional duplex printing accessory (figure 3-3), enables you to
print on both sides of a page. In two-sided printing, known as duplex
printing or duplexing, the back side of the page is printed first. Then
the page is sent through the duplex printing accessory, where it is
flipped over and sent back through the printer for printing on the front.
Note Although the printer detects the presence of the duplex printing
accessory, to print on two sides of the page, you must still specify duplex
options in your software application or in the printer driver.
Figure 3-3 Duplex Printing Accessory