25 July 2010
Using the Motion Editor in Adobe Flash Professional, you can control the shape of each property curve of a tween by editing the curve of each graph with standard Bézier controls. These controls are similar to working with the Selection tool or the Pen tool.
Move a curve segment or control point upward to increase the property's value; move it downward to decrease the value. Reposition property keyframes to different frames of the tween span to change how the tween appears.
To change the shape of a curve segment between two control points, drag the segment. When you drag a curve segment, the control points at each end of the segment become selected. If the selected control points are smooth points, their Bézier handles appear.

To learn more about selecting and manipulating curve segments, see Drawing with the Pen tool in the Flash documentation. To get more information about editing curve segments, see Editing property curves with the Motion Editor in the Flash documentation.

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