Printing on both sides (Macintosh)
Automatic two-sided printing (duplexing) is available by using the automatic duplexer on the
HP LaserJet 3390/3392 all-in-one. Manual duplexing is available on the HP LaserJet
3050/3052/3055/3390/3392 all-in-one. To duplex manually, print on both sides of a page by feeding
the page through the all-in-one twice.