Slide the paper guides so that they closely ﬁt the right and left
edges of the stack of envelopes.
Proceed to "Selecting Paper Delivery,". ( → See below.)
Selecting Paper Delivery
For thick paper, transparencies, label sheets, postcards, stamped, self-addressed
postcards and envelopes, you must switch the paper delivery to the sub-output tray.
For plain paper, you can select the type of paper delivery that suits your purpose.
Make sure that the paper guides are set to the size of the envelopes. A paper feed
failure or paper jams may occur if they are too loose or too tight.
Do not touch or remove the envelopes from the paper tray during printing. This may
cause a printer malfunction.