Oki B4545 MFP User Manual page 21

Installation
5. Put a stack of 500 paper sheets,
maximum, into the paper tray,
making sure to always position
the paper so that the up-side,
when the paper is packed, is
always facing up.
Remark : always hold the paper tray with both hands when removing it or putting it back
into the additional paper unit.
6. Put the cover back onto the tray, and
insert the paper tray into the additional
paper unit.
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