Lexmark MX310 User Manual page 38

Loading paper and specialty media 38
Note: When loading A6‑size paper, make sure the multipurpose feeder extender rests lightly against
the edge of the paper so that the last few sheets of paper remain in place.
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Load letterhead faceup with the top edge entering the printer first. For two‑sided (duplex) printing, load
letterhead facedown with the bottom edge entering the printer first.