Canon 3743B002 Basic Manual page 48

Important
If you do not specify the envelope size or orientation properly, the address will be printed
upside down or will be turned to 90 degrees.
Note
The machine may make operating noise when feeding envelopes.
In Windows, if the print result is upside down, open the printer driver setup window, select
Envelope in Commonly Used Settings, then select the Rotate 180 degrees check box in
Additional Features.
For details on the printer driver settings, see
.
Documents (Macintosh)
Printing Documents (Windows) or
Printing
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