HP LaserJet Enterprise M806x+ Black and White Laser Printer - Manual (Page 108)

Table 3-17 Tray 2, 3, 4, and 5 paper orientation
Paper type Image orientation Duplex mode How to load paper
Preprinted or letterhead Portrait 1-sided printing Face-down
Top edge of the back of the tray
Automatic 2-sided printing Face-up
Top edge at the back of tray
Landscape 1-sided printing Face-down
Bottom edge toward the right side
of the tray
Automatic 2-sided printing Face-up
Bottom edge toward the right side
of the tray
100 Chapter 3 Supported paper sizes and types for finishing accessories ENWW