The Gravity behavior drags your layer downward at a progressively accelerating rate, like actual gravity.
- Acceleration: Sets the speed at which acceleration will occur. The distance the layer travels per second will be increase by the specified number of pixels for each second of travel. So if Acceleration is set to 100, for example, the layer will travel 100 pixels toward the Target in the first second, 200 pixels in the second second, and 300 pixels in the third second, for a total of 600 pixels traveled in three seconds.