Change the acceleration and deceleration

By default, tweened frames play at a constant speed. With easing, you can create a more realistic rate of acceleration and deceleration. Positive values begin the tween rapidly and decelerate the tween toward the end of the animation. Negative values begin the tween slowly and accelerate the tween toward the end of the animation. You'll now add both positive and negative easing values to your animation.

1. On the TireAnim layer, select any frame between Frames 2 and 14. Then in the Property inspector, in the Ease text box, type 100. Press Enter or Return.
2. On the same layer, select any frame between Frames 16 and 29. Then in the Ease text box, type -100. Press Enter or Return.
3. On the ShadowAnim layer, select any frame between Frames 2 and 14. Then in the Ease text box, type 100. Press Enter or Return.
4. In the same layer, select any frame between Frames 16 and 29. Then in the Ease text box, type -100. Press Enter or Return.