Load envelopes in the paper tray.
For details about how to load envelopes, see Loading Envelopes.
Select the paper size setting of the paper tray in which the envelopes are loaded on the [Tray Paper Settings] screen.
For details about how to access the [Tray Paper Settings] screen, see Displaying the Printer Configuration Screens Using the Control Panel.
Select the envelope size, and then press [OK].
Select the paper type setting of the paper tray in which the envelopes are loaded.
Press [Paper Type].
Press [] repeatedly until [Envelope] appears.
Press [Envelope], and then press [OK].
Press [Paper Thickness].
Select the appropriate item, and then press [OK].
Press the [User Tools] key.
Configure the paper settings appropriately using both the printer driver and the control panel. For details about paper settings using the printer driver, see Printing on Envelopes.