Brother DCP-9055CDN Basic User's Manual page 22

Chapter 2
a
Open the MP tray and lower it gently.
b
Pull out the MP tray support and unfold
the flap (1).
1
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c
Lift up the support flap to prevent
envelopes and thick sheets of paper
from sliding off the face down output
tray. If the support flap is closed you
should remove each envelope as soon
as it comes out of the machine.
d
Put up to 3 envelopes or up to 25 sheets
of thick paper (163 g/m
If you add more envelopes or paper it
may cause a jam. Make sure:
 The top of envelope edge is
positioned between the arrows (1).
 The side to be printed on must be
face up.
2
) in the MP tray.