HP Deskjet F4400 All-in-One series - Page 28

 Remove all paper from the main input tray.
b. Load envelopes.
 Insert one or more envelopes into far-right side of the input tray, with envelope
flaps on left and facing up.
 Slide stack of envelopes forward until it stops.
 Slide paper-width guide to the right against stack of envelopes until it stops.
Load media 25
Paper basics