HP Officejet 2621 All-in-One Printer - Manual (Page 27)

2. Lower the output tray and pull out the output tray extender.
3. Lift the input tray shield, slide the paper-width guide to the left, and then remove all paper from
the input tray.
4. Insert one or more envelopes into far-right side of the input tray and slide the stack of envelopes
down until it stops.
The side to be printed on should face up. The flap should be on the left side and facing down.
5. Lift the input tray shield and slide the paper-width guide to the right against the stack of
envelopes until it stops.
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