Apple Motion 5.1.1 - Manual (Page 310)

Chapter 9 Behaviors 310
Use the Start Offset slider to you delay the beginning of the behavior’s effect, relative to the
first frame of its position in the Timeline. Adjust this parameter to make the Parameter behavior
start later.
Use the End Offset slider to extend the behavior’s effect relative to the last frame of its position
in the Timeline. Using this slider to stop the effect, instead of trimming the end of the behavior in
the Timeline, lets you freeze the behavior’s effect on the object for its remaining duration.
The following example illustrates how to use the Start Offset and End Offset parameter with the
Ramp behavior.
Use the Start Offset and End Offset parameters
1 Select an object, such as a shape.
2 In the Properties Inspector, Control-click the Scale parameter, then choose Add Parameter
Behavior > Ramp from the shortcut menu.
The Ramp behavior is applied to the Scale parameter of the object, and the Behaviors Inspector
opens. The Ramp behavior lets you create a gradual transition in any animatable parameter.
3 Set the Start Value to 0 and the End Value to 200, then play the project.
The object scales from its original size to twice its original size over the duration of the object.
4 Set the Start Offset to 90 and the End Offset to 90.
The object does not begin scaling until frame 90, and stops scaling 90 frames from its last frame
in the Timeline.
Combine behaviors with keyframes
Combine behaviors with keyframes overview
Any object can have behaviors and keyframes applied to it simultaneously. When this happens,
the values generated by the behavior and the keyframed values applied to the parameter
are combined to yield the final value for that parameter. This lets you combine the automatic
convenience of behaviors with the direct control of keyframing to achieve your final result.
Note: Motion has a specific order of operations for keyframes and behaviors. For more
information, see
Behavior order of operations on page 306.
For example, if you create an animation path using keyframes, you can create a completely
predictable and smooth movement.
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