Lexmark MC2425
Adjust the edge guides to match the width of the paper that you are loading.
Note: Make sure that the guides fit snugly against the paper, but not too tight as to cause the paper to buckle.
Load a sheet of paper with the printable side facedown.
Note: Make sure that the paper is loaded straight to avoid skewed or crooked print.
Feed the paper until its leading edge gets pulled in.
Warning—Potential Damage: To avoid paper jams, do not force paper into the manual feeder.