Tilt shift effect
Add blur to the top and bottom of the entire layer or object. Perfect to simulate a tiny world or a camera focus effect.

A sharp horizontal band is kept in the middle while the areas above and below it are blurred. The blur controls how strong that blur is, and the gradient blur controls how gradually the image transitions from sharp to blurred. This is a 2D-only effect.
Reference
All effects are listed in the effects reference page.