HP DeskJet GT 5820 - Manual (Page 26)

2. Slide the paper-width guide to the left.
3. Insert one or more envelopes into the 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. For envelope with flap on the long edge, insert the envelope
vertically with the flap on the left side and facing down. For envelope with the flap on the short edge,
insert the envelope vertically with the flap on the top and facing down.
4. Slide the paper-width guide to the right against the stack of envelopes until it stops.
5. Pull out the output tray and the tray extender.
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