HP LaserJet 9040.9050 Multifunction Printer series - Manual (Page 60)

56 Chapter 3 Printing ENWW
2 Load up to 10 envelopes in the center of Tray 1 with the side to be printed on facing up, and
the postage end toward the MFP. Slide the envelopes into the MFP as far as they will go
without forcing them.
3 Adjust the guides to touch the envelope stack without bending the envelopes. Make sure that
the envelopes fit under the tabs on the guides.
4 Change the fuser levers (see To change the fuser levers ).
To change the fuser levers
1 Move the output device away from the MFP to gain access to the left door.