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Chapter 13. Keyframe Interpolation > Using a Value, Speed, or Velocity Graph

Using a Value, Speed, or Velocity Graph

To control the temporal interpolation manually, you must reveal a graph of the layer property. Most properties in the layer outline expand to reveal a value graph and a velocity graph. In contrast, spatial properties—Position, Effect Point, and Anchor Point—expand to reveal a speed graph.

Value Graph

A value graph measures a (nonspatial) property's value vertically and its time horizontally (Figure 13.47). The units in which values are expressed depend on the type of property: Rotation is measured in rotations and degrees, Opacity in percentages, and so on. The slope of the line between keyframes represents the rate of change, in units/second. Straight lines indicate a constant rate; curved lines indicate a changing rate, or acceleration.


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