HP LaserJet Enterprise M806 Printer series - Manual (Page 30)

Table 2-2 Tray 2 and Tray 3 paper orientation (continued)
Paper type Image orientation Duplex mode How to load paper
Prepunched Portrait 1-sided printing Holes toward the right side of the tray
Automatic 2–sided printing Holes toward the left side of the tray
22 Chapter 2 Paper trays ENWW