Specifying envelope size for tray 1

Press the [User Tools] key, and then select the setting items using the [ ] or [ ] key.

Select [Tray Paper Settings] Press [OK]

Select [Paper Size: Tray 1] Press [OK]

Select the envelope size Press [OK]

For details about the available paper size, see Recommended Paper Sizes and Types.
After specifying the paper size, select "Envelope" as the paper types using both the User Tools and printer driver, and specify the thickness of envelopes. For details, see "Printing on Envelopes", Print.