Apple Motion 4 - Manual (Page 432)

Applying Parameter Behaviors to a Behavior
You can animate a behavior’s parameter by applying a Parameter behavior. For example,
you can apply the Oscillate Parameter behavior to the Drag parameter of the Orbit Around
behavior, then adjust the Start and End values to increase from 0 to 8 over time. This
results in the orbit of the object slowly decaying, causing the object to fall toward the
center of the orbit.
Object with Orbit Around parameter Oscillate Parameter behavior added to the Drag
parameter of the Orbit Around behavior
For more information about adding Parameter behaviors, see Applying Parameter
Behaviors .
Keyframing Behaviors
If you need more control when animating a behavior’s parameters, you can use keyframes.
For example, you can keyframe the Drag parameter of the Orbit Around behavior to grow
and shrink the object’s orbit many times, creating a much more complex animation path.
Keyframing this animation path manually would be very difficult, but by keyframing a
single parameter within a single behavior, you can create this effect with ease.
Default Orbit Around behavior Default Orbit Around behavior with keyframed
Drag parameter
For more information about keyframing parameters, see Animating Behaviors .
432 Chapter 9 Using Behaviors