Lexmark C912 User Reference Manual page 27

Loading letterhead
a For both simplex (single-sided) and duplex (double-sided) printing on letterhead, place
the printed side face up.
b Continue with
6
Gently slide the print media into the multipurpose feeder.
Note: Forcing the print media may cause a jam.
7
Slide the width guides until they lightly rest against the edges of the print media. Do not bend
the print media.
8
Push the SET button to the left to unlock the bottom plate.
Printing
step 6.
Loading the multipurpose feeder
22