Brother DCP-L8400CDN Basic User's Manual page 30

Chapter 2
Printing on thick paper, labels and
envelopes from the MP tray
When the back cover (face-up output tray) is
pulled down, the machine has a straight
paper path from the MP tray through to the
back of the machine. Use this paper feed and
output method when you want to print on thick
paper, labels or envelopes. (For
recommended paper to use, see Acceptable
paper and other print media on page 28 and
Envelopes on page 31.)
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).
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b
(For printing envelopes only)
Pull down the two grey levers, one on
2
the left side and one on the right side,
as shown in the illustration below.
c
Open the MP tray and lower it gently.