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Do not use window envelopes.
Envelopes, especially those with glue on their flaps, may stick together. Fan the envelopes to separate them before loading. If the envelopes still stick together, load them one by one. For the envelope types that can be used with this machine, see Supported Paper Sizes and Types.
Misfeeds might occur depending on the length and shape of the flaps.
Load envelopes with their flaps closed. However, load envelopes with their flaps open when the flaps are opened at the time of purchase.
When loading envelopes with their flaps open, specify a custom size. You can print with a standard envelope size setting only when printing on envelopes with their flaps closed.
Before loading envelopes, press down on them to remove any air from inside, flattening out all four edges. If they are bent or curled, flattening their leading edges (the edge going into the machine) by running a pencil or ruler across them.
To get better output quality, it is recommended that you set the leading- and tailing-edge print margin to at least 15 mm (0.6 inches), and the left and right margins to at least 10 mm (0.4 inches) each.
