Open the rear cover.
Use the envelope lever.
Raising the envelope lever reduces roller pressure.
Close the rear cover.
Hold the both sides of the bypass tray and pull it toward you.
Fan envelopes, and then align their edges before loading.
When fanning envelopes, make sure the envelope flaps are not stuck together. If they are stuck together, separate them.
Before loading envelopes, flatten them out so that their curl does not exceed that shown in the illustration below.
If the curl is severe, flatten out the envelopes using your fingers, as shown in the illustration below.
If envelopes are severely curled after printing, flatten them by bending them back against the curl.
Set the envelope in bypass tray with the printing side facing up.
Adjust the paper guide both sides to fit the envelope width.
Keep the envelope lever lowered when printing normally.