Samsung ML-1520P - Manual (Page 52)

U SING P RINT M ATERIALS 3.11
3
3 When you print on envelopes, you must select Manual
Feed for Source from the software application, and then
select the correct paper size and type. For details, see
page 4.6.
4 Press the Cancel button to start feeding.
Note: Please be careful when you open the rear cover. The inside
of the printer maybe hot.
5 Printing is started. Close the rear output tray after the
printing is completed.