How should I load envelopes?

• See below.
  
  

  Loading Envelopes in the Cassette

  You can print on plain paper envelopes in this size: No. 10 (4.1 × 9.5 inches [105 × 241 mm]). You can load No. 10 size envelopes in Cassette 1 only.
  1. Close the paper stopper and output tray, if necessary.
     
     
  2. Pull out the paper cassette and remove the paper cassette cover.
     
     
  3. Slide the edge guides outward.
     
     
  4. Load envelopes printable side down and flap edge right as shown.
     
     

     Caution:
     To prevent paper feeding problems, make sure you do not load too many envelopes in the cassette.

  5. Slide the edge guides against the envelopes, but not too tightly.
     
     

     Note: Make sure the envelopes are loaded against the edge guide and not sticking out from the end of the cassette.

  6. Close the paper cassette cover and gently insert the paper cassette.
     
     

     Note: The envelopes may slide forward slightly as you insert the cassette. This is normal.

  7. When prompted by the product's LCD screen, select Envelope #10 for the Paper Size and Envelope for the Paper Type, and select OK.
  8. 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.
     • If print quality declines when printing multiple envelopes, try loading one envelope at a time.
     • Do not load envelopes that are curled, folded, or too thin.
  Related tasks
  Loading Paper for Documents in the Cassette
  Loading Paper and Envelopes in the Rear Feed Slot
  Related references
  Paper Loading Capacity