Lexmark All in One Printer - Manual (Page 46)

46 Loading Print Materials
Loading letterhead paper
For simplex (single-sided) printing on letterhead paper, place the
printed design side face down with the top edge of the page nearest
the knob for the paper size indicator.
For duplex printing on letterhead paper, place the printed design
side face up with the top of the page nearest the length guide.
N OTE : The printer has a Paper Loading menu setting that allows
simplex (single-sided) printing on letterhead (or other
preprinted media) that has been loaded specifically for duplex
printing. For more information, refer to the
Administrator’s
Guide .