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Chapter 8. Animating with Motion Tweening > Working with Motion Tweening

Working with Motion Tweening

Motion tweening can only be applied to instances of symbols. When applying motion tweening to groups or text objects, Flash automatically converts them into symbols and stores them in the Library. When this happens, they appear in the Library named as Tween 1, Tween 2, etc. It is a good idea to convert them into symbols as the tweening is applied. When managing large projects with many assets it can become confusing to have assets named in this generic way. Of course you can always rename them by selecting the field in the Library and typing in a new name.

If your tweened animation doesn't behave as expected, there are a few things you can check. If the object disappears when you play the animation and only re-appears on the end keyframe, you may have more than one object on the keyframe. Make sure that only one object, or instance, is on each keyframe in the tweened span. Also, make sure that both instances are of the same object. Flash cannot motion tween two different objects. To "morph" different shapes into each other you must use shape tweening.


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