HP Deskjet 6840 Color Inkjet Printer - Manual (Page 110)

The printer prints the odd-numbered pages first.
5. After the odd-numbered pages have been printed, reload the printed pages,
with the printed side facing up.
6. Click Continue to print the even-numbered pages.
Tablet binding
Follow these steps to print a two-sided document with a tablet binding:
1. Open the Printer Properties dialog box.
2. Click the Finishing tab.
HP Deskjet 6800 series printer
110