HP LaserJet 4050 Printer series - Manual (Page 67)

EN
Chapter 2: Printing Tasks 45
Printing Special Paper
Special paper includes letterhead, prepunched (including 3-hole
punched), envelopes, labels, transparencies, and custom-size
paper.
Printing Letterhead, Prepunched, or
Preprinted Paper
When printing letterhead, prepunched, or preprinted paper, it is
important to correctly orient the paper. See the “Paper Orientation”
section for instructions.