Brother MFC-8510DN Basic User's Manual page 20

Chapter 2
d
Lift up the support flap to prevent paper
from sliding off the face-down output
tray, or remove each page as soon as it
comes out of the machine.
12
Printing on thick paper, labels and
envelopes from the MP tray
Before loading, press the corners and sides
of the envelopes to make them as flat as
possible.
a
Open the back cover (face-up output
tray).
2