MACROMEDIA FLASH 8-FLASH Tutorials Manual page 175

8. In the Timeline, click the layer named Ball to select the frames in
that layer.
9.
In the Property inspector, click Edit next to the Ease slider.
10. In the Custom Ease In / Ease Out dialog box, press Control-C
(Windows) or Command-C (Macintosh) to copy the easing curve you
applied to the ball tween.
11. Click Cancel to dismiss the dialog box.
12. In the Timeline, click the layer named Shadow to select all the frames
in that layer.
13.
In the Property inspector, select Motion from the Tween menu.
14.
Click Edit next to the Ease slider.
15.
In the Custom Ease In / Ease Out dialog box, press Control+V
(Windows) or Command+V (Macintosh) to paste the easing curve from
the ball tween.
16.
Click Play in the dialog box to preview the animation on the Stage.
By applying the same curve to the Shadow tween, you have made the
transparency of the shadow animate according to the proximity of the
ball. This way the shadow appears to become darker as the ball
approaches the surface and lighter as the ball bounces away from the
surface.
17.
Click OK to close the dialog box.
18.
Select File > Save to save your FLA file.
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