Samsung CLP 550 - Manual (Page 86)

U SING P RINT M ATERIALS 3.10
2 If you are using paper, flex or fan the edge of the paper
stack to separate the pages before loading.
For transparencies, hold them by the edges and avoid
touching the print side. Oils from your fingers can cause
print quality problems.
3 Load the print material with the print side facing down
and against the right edge of the tray.
4 Pinch the paper width guide and slide it to the right to touch
lightly against the edge of the material without bending it.