HP Deskjet 9800 Printer series - Manual (Page 77)

For Macintosh
1 Load the appropriate paper (see Loading media in the input tray ).
2 Click File, and then click Print.
3 Open the Two-Sided Printing panel.
4 Select Print Both Sides.
5 Select the desired binding orientation by clicking the appropriate icon.
6 Change any other desired print settings and click Print.
Printing on both sides (duplexing) 67