Specifying envelope size for the envelope feeder unit

Press the [Menu] key.

Press the [] or [] key to select [Paper Input], and then press the [OK] key.

Press the [] or [] key to select [Paper Size: (tray name)], and then press the [OK] key.

Select the paper size you want to set using the scroll keys, and then press the [OK] key.

Press the [Menu] key to return to the initial screen.