Apple Motion 2 - Manual (Page 337)

Chapter 5 Using Behaviors 337
Since behaviors do not add keyframes to the objects to which they’re applied,
trimming the Out point of a behavior usually resets the object to its original state for
times beyond the duration of the behavior. For many behaviors, using the Stop
behavior to pause the object’s animation is a better method to use than trimming its
Out point. Another way to stop a behavior’s effect and leave the affected object in the
transformed state is to adjust a behavior’s Start and End Offset parameters. See
“
Changing the Offset of Parameter Behaviors ” on page 337 for more information.
Note: The Spin and Throw behaviors leave the object at the transformed state after the
last frame of the trimmed behavior for the object’s remaining duration.
Moving Behaviors in Time
In addition to changing a behavior’s duration, you can also move its position in the
Timeline relative to the object it’s nested under. This lets you set the frame at which
that behavior begins to take effect.
To move a behavior in the Timeline:
1 Click anywhere within the middle of a behavior’s bar in the Timeline.
2 Drag the behavior to the left or right to move it to another position in the Timeline.
As you move the bar, a tooltip appears and displays the new In and Out points for the
behavior. It also displays the delta value, which shows the number of frames you have
moved the bar.
Changing the Offset of Parameter Behaviors
Parameter behaviors have two additional parameters, Start Offset and End Offset,
which are used to change the frame where a parameter behavior’s effect begins and
ends.
The Start Offset parameter has a slider that lets you delay the beginning of the
behavior’s effect, relative to the first frame of its position in the Timeline. You can adjust
this parameter to make the parameter behavior start later.
The End Offset parameter lets you offset the end of 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.
01112.book Page 337 Sunday, March 13, 2005 10:36 PM