Lexmark MX721
Open the multipurpose feeder.
Adjust the guide to match the size of the paper that you are loading.
Flex, fan, and align the paper edges before loading.
Load paper with the printable side faceup.
Warning—Potential Damage: Do not use envelopes with stamps, clasps, snaps, windows, coated linings, or self‑stick adhesives.
From the control panel, set the paper size and paper type to match the paper loaded.
Changing the MPF pick roller can prevent paper feed problems from happening again.
You can prevent paper feed problems when you clean the MPF pick roller.