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5.Use the buttons at the top of the dialog to allow or prevent movement or scaling. For more information, see Changing editing options on page 256.

Tip: Right-click the workspace to display a shortcut menu that displays commands to restore, center, or flip the selection box. You can also force the box to match the source media's aspect ratio or your project's output aspect ratio. Matching the output aspect ratio can prevent black bars from appearing when you use source media (such as photographs) that does not match your project's aspect ratio.

6.The 3D track motion occurs instantly, and the results are updated in the Video Preview window.

7.Use the keyframe controller at the bottom of the Track Motion window to establish distinct track motion settings throughout the duration of the track.

During playback, immediate frames are interpolated to create smooth motion. Expand the Keyframe interpolation heading on the left side of the window and drag the Smoothness slider to adjust the interpolation. For more information, see Using keyframe animation on page 273.

USING VIDEO FX, COMPOSITING, AND MASKS

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