HP Color LaserJet Enterprise M855 Printer series - Manual (Page 26)

Table 2-1 Tray 1 paper orientation (continued)
Paper type Image orientation Duplex mode How to load paper
Automatic 2-sided printing Face-up
Top edge toward the left
Envelopes Short edge of the envelope
feeding into the product
1-sided printing Face-down
Top edge toward the back of the product
18 Chapter 2 Paper trays ENWW