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327Motion User Guide
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 in Motion.
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 in Motion.
Remove a parameter from the Custom parameter list
• In Motion, click the Remove Parameter pop-up menu, then choose a parameter to remove.
That parameter no longer appears in the Custom parameter pop-up menu. Any
keyframes applied to that parameter are deleted.
Exponential behavior in Motion
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.
You can also change the interpolation modes of keyframes to Exponential. See Set curve
interpolation in Motion.
Adjust this behavior using the controls in the Behaviors Inspector:
• Start Value: A slider to set the value that’s added to the parameter at the first frame of
the Exponential behavior.
• End Value: A slider to set the value the Exponential behavior reaches at the last frame
of the behavior. Over the life of the behavior, the parameter the Exponential behavior is
applied to makes a transition from the Start Value to the End Value, plus the original value.