Brother  HL-4140CN User Manual page 40

WARNING
DO NOT touch the shaded parts shown in
the illustration. These rollers may be
rotating at high speed.
b
While pressing the green paper-guide
release lever (1), slide the paper guides
to fit the paper size you are loading in
the tray. Make sure that the guides are
firmly in the slots.
1
c
Fan the stack of paper well to avoid
paper jams and misfeeds.
Loading paper
2
11