How do you do double sided printing on a HP Laserjet 1020?

The HP LaserJet 1020 does not have built-in duplex (double-sided) printing capabilities. To print on both sides, you need to manually flip the paper. First, print the odd-numbered pages, then reinsert the stack of printed pages into the printer in the correct orientation, and print the even-numbered pages. Be sure to check your printer settings and the document layout to ensure proper alignment.