Brother  HL-4140CN User Manual page 43

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.
14
Printing on envelopes and thick paper
from the MP tray
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
2