Dell 3010cn Color Laser Printer - Manual (Page 30)

2. Slide the width guides to the edge of the tray. The width guides should be fully extended.
3. Squeeze the length guide and slide it to the front edge of the tray.
4. Before loading the print media, flex the sheets back and forth, and then fan them. Straighten the edges of the stack on a level surface.
5. Place the print media into the tray with the recommended print side face up.
6. Slide the width guides and length guide until they rest lightly against the edge of the print media stack.
NOTE: Do not exceed the maximum fill line in the tray. Overfilling the tray may cause paper jams.