MOTION PRESETS ARE PRE-BUILT motion tweens that you can apply to an object on the stage. You simply select the object and click the Apply button in the Motion Presets panel and the preset animation is applied to your new object. It’s that simple.
The biggest feature of Motion Presets is the ability to save your own as custom presets. The advantage to this is having the ability to reuse animations over and over quickly and easily. Over time you will be able to build up a Library full of animations that not only can be easily applied to any object on the stage, but can also be shared across the entire Flash design community.