HP Color LaserJet 2550 Printer series - Manual (Page 59)

3. After the job finishes printing, remove any blank paper from tray 1. Insert the printed
stack, with the blank side up, and the top edge leading into the printer. Print the second
side from tray 1.
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4. Press (
G
O
) to continue printing.
ENWW Printing on both sides (duplexing manually) 49