Brother DCP-9055CDN - Manual (Page 22)

Chapter 2
14
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. Printing on envelopes and thick paper
from the MP tray
2
Before loading, press the corners and sides
of the envelopes to make them as flat as
possible.
a
Open the MP tray and lower it gently.
b
Pull out the MP tray support and unfold
the flap (1).
1