Samsung ML--6100 - Manual (Page 47)

3. 8 Print Media Information
5. Load one type of print material in the MP tray. Do not mix types.
See the following directions to load each type of print material.
• Load paper with the left edge of the stack against the left edge of the
tray with the print side face up.
• Load envelopes with the flap side down. The stamp area is on the left
side. The end of the envelope with the stamp area enters the MP tray
first.
Note:
• Do not feed stamped envelopes. The stamp is shown for placement only.
• Never use envelopes with clasps, snaps, windows, coated lining, or self-stick
adhesives. These envelopes may severely damage the printer.
• Load transparencies or label sheet with a paper backing, load with the
paper side down.