HP LaserJet Pro MFP M127fw - Manual (Page 23)

Table 2-1 Input tray paper orientation
Paper type Duplex mode How to load paper
Preprinted or letterhead 1–sided printing or 2–sided printing Face-up
Top edge leading into the product
Prepunched 1–sided printing or 2–sided printing Face-up
Holes toward the left side of the product
Envelopes 1-sided printing Face-up
Top edge toward the right of the tray, postage end entering
the product last
ENWW Load the input tray 15