Lexmark MS810 User Manual page 58

Using MS810n, MS810dn, MS811n, MS811dn, MS812dn, MS817n, MS817dn, MS818dn
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Make sure the paper is below the maximum paper fill indicator.
Warning—Potential Damage: Overfilling the tray can cause paper jams.
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Insert the tray.
Note: Press the paper stack down while inserting the tray.
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