Samsung SF-515 - Manual (Page 18)

1.9
Installation
Paper tray
Automatic paper feeder
Loading paper
For best results, use high quality xerographic paper. The automatic paper
feeder can hold a maximum of 150 sheets of plain paper. The maximum
capacity may be less, depending on the paper thickness.
1. Pull the paper tray on the automatic paper feeder all the way up.
2. Flex or fan the paper back and forth. Do not fold or crease the paper.
Straighten the edges on a level surface.