Brother MFC-L6750DW Online User's Manual page 36

For Legal or Folio size paper, press the release button (1) in the bottom of the paper tray or the release
lever (2) in the back of the tray, and then pull out the back of the paper tray. (Legal and Folio size paper are
not available in some regions.)
For trays with a release button:
1
For trays with a release lever:
3. Fan the stack of paper well.
4. Load paper in the paper tray with the printing surface face down.
DO NOT load different sizes and types of paper in the paper tray at the same time. Doing this may cause
the paper to jam or misfeed.
5. Make sure the paper is below the maximum paper mark (b b b).
Overfilling the paper tray will cause paper jams.
6. Slowly push the paper tray completely into the machine.
7. Open the machine's back cover (the face up output tray).
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