Flash glossary: Motion path
When a tween contains motion, a motion path appears on the Stage. The motion path shows the position of the tweened object in each frame.
You can edit the motion path of a tween in Adobe Flash Professional by changing the position of the object in any frame of the tween span, moving the entire motion path to a different location on the Stage or using the Selection, Subselection, or Free Transform tools to change the shape or size of the motion path.
Use the Transform panel (Modify > Transform) or the Property inspector to change the shape or size of a motion path. You can also draw a custom stroke as a motion path or use the Motion Editor to adjust the motion path.
The simplest way to edit a motion path is to move the target instance of the tween in any frame of the tween span. If the frame does not already contain a property keyframe, Flash creates one automatically.
After relocating an object in a motion tween on the Stage, the motion path updates to include the object's new location. All other property keyframes in the motion path remain in their original locations.
To learn more about working with motion paths, see the section titled Edit the motion path of a tween in the Flash documentation, as well as the section titled Motion paths in the Animation Learning Guide for Flash. Also watch the video, Altering the curve of a motion path (Peachpit Press).
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