How should I load envelopes?

See below.

Loading Paper or Envelopes in the Rear Paper Feed Slot

You can print envelopes or documents in a variety of paper types and sizes in the rear paper feed slot.
1. Open the feeder guard and pull up the paper support.
   
   
2. Slide the edge guides outward.
   
   
3. If you are inserting a stack of paper, fan the sheets and tap the stack on a flat surface to even the edges.

   Note: You can load one sheet of binder paper with holes on one of the long edges as shown. Do not select automatic 2-sided printing for this type of paper.
   
   

4. Do one of the following:
   • Insert paper, glossy or printable side up and short edge first, in the center of the slot.
     
     

     Caution:
     To prevent paper feeding problems, make sure you do not load paper above the arrow marks inside the edge guides.

   • Load envelopes short edge first, with the flap facing down and the flap edge to the left, in the center of the slot.
     
     
5. Slide the edge guides against the paper or envelopes, but not too tightly.
   
   
6. Extend the output tray.
   
   
7. Do one of the following:
   • Select the size and type of paper you loaded on the LCD screen.
   • Press the  Paper Setting button and select the paper source, then select the size and type of paper you loaded.
   • Select the size and type of paper you loaded in the Settings > General Settings > Printer Settings > Paper Source Settings > Paper Setup menu.
Always follow these paper loading guidelines:
• Load only the recommended number of sheets.
• Load paper short edge first, no matter which way your document faces.
• Load the printable side faceup.
• Load letterhead or pre-printed paper top edge first.
• Do not load paper above the line under the arrow mark inside the edge guides.
• 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.
• Do not load windowed envelopes or envelopes with adhesive surfaces on the flaps.
• Check the paper package for any additional loading instructions.
Related tasks
Loading Paper in the Cassette
Related references
Paper Loading Capacity