Lexmark MS810n / MS810dn / MS810dtn
Try one or more of the following:
Note: If no paper is loaded in the feeder, the printer manually overrides the request, and then prints from an automatically selected tray.
How to Orient Letterhead Paper in the Multipurpose Feeder for Duplex Printing
Lexmark MX/MS31x_41x_51x_61x_71x_81x and XM/Mxxxx: 250.06 and 250.14 Paper Jams