HP Color LaserJet Enterprise M855 Printer series - Manual (Page 33)

Table 2-3 3x500-sheet tray paper orientation
Paper type Image orientation Duplex mode How to load paper
Preprinted or letterhead Portrait 1-sided printing Face-up
Top edge at the back of the tray
Automatic 2-sided printing Face-down
Top edge at the back of the tray
Landscape 1-sided printing Face-up
Bottom edge toward the right side of the tray
Automatic 2-sided printing Face-down
Top edge toward the right side of the tray
ENWW Load the 3x500-sheet trays 25