Brother HL-5240 - Manual (Page 18)

2. Printing Methods
10
b Pull the paper tray completely out of the printer.
c While pressing the blue paper-guide release lever, slide the paper guides to fit the paper size. Make sure
that the guides are firmly in the slots. For legal size paper
1
, press in the paper-guide release lever and
pull out the back of the paper tray.
1 Legal size paper is not available in some regions outside the USA and Canada.
d
Put paper in the tray, and below the maximum paper mark (b).