Lexmark MX6500 Quick Reference page 9

Without an optional staple finisher With an optional staple finisher
One‑sided printing One‑sided printing
Two‑sided printing Two‑sided printing
• If you are loading prepunched paper for use with the staple
finisher, then make sure the holes on the long edge of the paper
are on the right side of the tray.
One‑sided printing Two‑sided printing
Note: If the holes on the long edge of the paper are on the
left side of the tray, then a jam may occur.
•
Do not slide the paper into the tray. Load paper as shown in the
illustration.
9
•
If you are loading envelopes, then make sure that the flap side
is facing up and the envelopes are on the left side of the tray.