Canon LBP 3370 User Manual page 140

IMPORTANT
Up to approximately 5 envelopes can be loaded in the multi-purpose tray. Make
•
sure that the paper stack does not exceed the load limit guides.
You cannot print on the reverse side (glued side) of envelopes.
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When loading envelopes at a size of DL, COM10, C5, or Monarch, load them so
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that the flap is toward the left of the printer when viewed from the front.
When loading envelopes of the Envelope B5 size, close the flaps and load them so
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that the envelopes are fed from the top (the edge with the flap).
Loading Paper in the Multi-purpose Tray
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