HP Deskjet 6122 Color Inkjet Printer - Manual (Page 45)

When the first side prints, the printer pauses while the first side of the printed page dries. Once dry,
the second side of the page is printed and released.
For a description of the duplexer, see two-sided printing accessory (duplexer) .
manual two-sided printing
Use the manual two-sided printing feature if:
●
The duplexer is not attached to the printer
●
You want to print a two-sided document on a media type the duplexer does not support
rear access door
If the duplexer is not attached to the printer, the printer cannot feed paper unless the Rear Access
Door is attached.
Push the Rear Access Door into place.
5. Select the Automatic box.
6. Change any other desired print settings, then click OK .