Brother MFC-J825DW Basic User's Manual page 26

Chapter 2
f
Gently adjust the paper side guides (1)
to fit the paper using both hands.
Make sure the paper side guides touch
the sides of the paper.
g
Close the output paper tray cover.
h
Slowly push the paper tray completely
into the machine.
12
1
i
While holding the paper tray in place,
pull out the paper support (1) until it
clicks, and then unfold the paper
support flap (2).
IMPORTANT
DO NOT use the paper support flap for
Legal size paper.
2
1