Samsung ML-2151N-XBH - Manual (Page 75)

U SING P RINT M ATERIALS 4.10
3 Prepare a stack of paper for loading by flexing or fanning
them back and forth. Straighten the edges on a level
surface.
4 Place paper on the centre of the tray with the print side
face up.
If you want to print on previously printed paper from the
Multi-Purpose Tray, the printed side should be facing down
with an uncurled edge to the printer. If you experience
problems with paper feed, turn the paper around.
N OTE : Make sure that you have not loaded too much print
materials. The print material buckles if you load a stack that is too
deep or push it in too far.