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Chapter 13. Keyframe Interpolation > Viewing Motion Paths and Spatial Interpola...

Viewing Motion Paths and Spatial Interpolation

When animated, only three property types result in a motion path: layer position, effect point, and anchor point. In order to manipulate spatial interpolation, make sure you can view the proper controls in the Composition or Layer windows. Position and effect point paths appear in a Composition window; anchor point paths appear in a Layer window. The following tasks describe how to use the pull-down menus in each window to view the information you need.

To show or hide motion path information in the Composition window:

In the Composition window's pull-down menu, select the information you want to show (Figure 13.18). A check indicates that the information appears in the Composition window; no check indicates that it is hidden (Figure 13.19).

Figure 13.18. In the Composition window's pull-down menu, select the information you want to view.


Figure 13.19. The Composition window can display motion path information of a selected layer.


Layer Handles displays the layer frame with dots, or handles, around its peri meter. The handles are used to scale the layer.

Layer Paths displays the course the selected layer will follow as a dotted line connecting keyframes. The spacing of the dots indicates the speed of motion.

Figure 13.21. The anchor point motion path appears in a Layer window.


Layer Keyframes displays each keyframe of the selected layer's position as an x. Selecting a keyframe in either the Composition window or layer outline highlights the keyframe. The number of visible keyframes depends on how you set the motion path preferences.

Layer Tangents displays the tangents, or direction handles, extending from selected keyframes on the motion path. Tangents only extend from keyframes that use one of the three types of Bézier interpolation.


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