Apple Motion 5.1.1 - Manual (Page 335)

Chapter 9 Behaviors 335
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In the Library, select the Behaviors category, select the Parameter subcategory, then drag the
Custom icon to the object in the Canvas, Layers list, or Timeline.
The Custom behavior is applied to the object. The behavior has no effect until you add a
parameter to the behavior.
2 In the Custom area of the Behaviors Inspector, choose a parameter to add to the
Custom parameter list from the Add Parameter pop-up menu. This menu contains every
animatable parameter.
The parameter you chose appears near the top of the Custom area in the Behaviors Inspector.
After you add the parameters to animate in your Custom behavior, you can keyframe them in
the Keyframe Editor to create whatever animated effect you require. For more information on
keyframing parameters to create animation, see
Apply keyframes to behaviors on page 452.
After you animate the parameters you added, you can save the Custom behavior into the Library
for future use. For more information about saving Custom behaviors to the Library, see
Save
custom behaviors on page 313.
Remove a parameter from the Custom parameter list
m Choose the parameter to remove from the Remove Parameter list.
That parameter no longer appears in the Custom parameter list. Any keyframes applied to that
parameter are deleted.
Exponential
The Exponential behavior creates more natural animations when scaling objects, especially when
using high values. For example, when an object scales from very small to very large, our eyes
erroneously perceive the animation to slow down as the object reaches its upper scale values.
The Exponential parameter behavior allows such an animation to speed up the scaling as the
values increase to compensate for that illusion, and create a more uniform-looking scale effect.
Tip: When applied to parameters other than Scale, the Exponential parameter behavior creates
more organic animations than other interpolation modes.
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