- Tap Envelope Printing.
- Tap Print Mode on the lower left side of the Envelope Printing mail screen. You may have to swipe up on the screen to see this option.
- Swipe up on the Print Mode screen and tap Seal Only.
- Tap Apply.
- Load the envelopes onto the feeder with the flap side facing down and the top edge against the rear wall.
UPDATED: November 23, 2020