Samsung CLP 500N - Manual (Page 79)

U SING P RINT M ATERIALS 3.15
3
4 Pinch the paper width guide and slide it to the right to touch
lightly against the edge of the stack without bending it.
5 When you print, configure the paper source to MP Tray, the
paper type to Envelope and the paper size in the software
application. For details, see page 4.7.