Apple Motion 4 - Manual (Page 438)

The Fade In/Fade Out behavior is useful for introducing and removing elements you’re
animating in a project. For example, you could apply the Fade In/Fade Out behavior to
text that moves across the screen to make it fade into existence, and then fade away at
the end of its duration.
Note: Fade In/Fade Out behavior cannot be applied to a camera or light.
Parameters in the Inspector
Fade In Time: A slider defining the duration, in frames, over which the object fades in
from 0 to 100 percent opacity from the first frame of the object. A duration of 0 frames
results in a straight cut into the object, making it appear instantly.
Fade Out Time: A slider defining the duration, in frames, over which the object fades
out from 100 to 0 percent opacity from the last frame of the object. A duration of 0 frames
results in a straight cutaway from the object, making it disappear instantly.
Start Offset: A slider that lets 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 behavior
start later. This parameter value is measured in frames.
End Offset: A slider that lets you offset the end of the behavior’s effect relative to the
last frame of its position in the Timeline, in frames. Adjust this parameter to make the
behavior stop before the actual end of the behavior in the Timeline. Use this slider to
offset the end of the Fade Out effect from the end of the object.
HUD Controls
The HUD lets you control the Fade In and Fade Out durations, equivalent to the Fade In
Time and Fade Out Time parameters in the Behaviors tab of the Inspector. Drag anywhere
within the shaded area of the Fade In or the Fade Out ramp to adjust their durations.
Note: Continue dragging beyond the limits of the graphical HUD control to extend the
durations of the Fade In or Fade Out.
Fade In
Fade Out
Grow/Shrink
Use the Grow/Shrink behavior to animate the scale of an object, enlarging or reducing
its size over time at a speed defined by either the Scale Rate or Scale To parameter. The
Grow/Shrink effect always begins at the object’s original size at the first frame of the
behavior.
438 Chapter 9 Using Behaviors