You can load envelopes in the main tray of the paper cassette. You can print on plain paper envelopes in this size:
No. 10 (4.1 × 9.5 inches [105 × 241 mm])
Close the output tray, if necessary.
Open the front cover.
Pull out the paper cassette.
Remove any paper loaded in the photo tray on top, if necessary.
Slide in the main tray extension (if it is extended) and flip back the photo tray.
Pinch the tabs on the main tray edge guides and slide them outward.
Load up to 10 envelopes in the main tray as shown. Load them printable side down and flap edge left.
Slide the edge guides to the edges of the envelopes.
Lower the photo tray.
Slide the photo tray forward and make sure the envelopes do not flip up at the back end of the tray.
If you need to load paper in the photo tray, see the instructions for that section.
Replace the paper cassette.
Extend the output tray and open the paper stopper.
Always follow these envelope loading guidelines:
If you have trouble loading a stack of envelopes, press each envelope flat before loading it or load one envelope at a time.
Do not load envelopes that are curled, folded, or too thin.
Loading Paper in the Main Tray
Loading Paper in the Photo Tray
Paper Loading Capacity