Adobe AFTER EFFECTS 5.5 Help Manual page 129

Adobe After Effects Help
Using Help | Contents
Mixing incoming and outgoing interpolation methods
By default, a keyframe icon uses one interpolation method, but you can apply two
methods: the incoming method applies to the property value as the current time
approaches a keyframe, and the outgoing method applies to the property value as the
current time leaves a keyframe. When you set different incoming and outgoing interpo-
lation methods, the keyframe icon changes accordingly. It displays the left half of the
incoming interpolation method icon and the right half of the outgoing interpolation icon.
You can freely mix Linear and Bezier interpolation methods using the Speed or Velocity
graph. See "Fine-tuning speed" on page 134. Because Auto Bezier interpolation automati-
cally adjusts both incoming and outgoing direction handles, once you mix Auto Bezier
with another method, the original half of the keyframe becomes Bezier.
To mix Bezier and Linear interpolation methods:
1 In the Timeline window, select the Bezier or Linear keyframe you want to change.
2 Expand the layer outline to display the Speed or Velocity graph for the layer property
containing the keyframe.
Note: Make sure that you adjust the handles on the Speed or Velocity graph, not the Value
graph. See "Factors affecting speed" on page 131.
3 Drag the incoming or outgoing handle to adjust the speed of the keyframe.
To apply or remove Hold interpolation as outgoing interpolation:
1 In the Timeline window, select the keyframe you want to change.
2 Choose Animation > Toggle Hold Keyframe.
Setting the default spatial interpolation to Linear
When you create spatial changes in a layer, After Effects uses Auto Bezier as the default
spatial interpolation. You can change this default to Linear.
To set the default spatial interpolation to Linear:
1 Choose Edit > Preferences > General.
2 Select the Default Spatial Interpolation to Linear option and click OK.
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Fine-tuning Animation
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