User Manual

ADDING VIDEO TRANSITIONS AND MOTION | 343
Using keyframes in track motion
Keyframes are what create the motion in the track motion feature. You can create, modify, and remove keyframes in the keyframe
controller in the same way as with any other feature that uses keyframes. In addition, for track motion and 3-D track motion, you can
use keyframe presets to save and recall the settings of the selected keyframe row at the cursor position.
For more information, see
Using keyframe animation on page 332.
The keyframe controller in the Track Motion window has three attributes that can be animated: position, shadow, and glow. Each
effect can be animated independently. The shadow and glow effects can be turned on and off. Each effect has its own set of
controls that appear on the left-hand side of the window. You can access these controls by clicking the respective item on the
keyframe controller.
Position
You can control the position of the overlay in the main window by dragging the selection box or editing the controls on the left side
of the window. However, the Position, Orientation, and Rotation controls in the window are invaluable when you need precision in
resizing, moving, or rotating the overlay.
The Smoothness box allows you to modify the smoothness of the interpolation curve among three or more keyframes.
You can use the Workspace controls to adjust the magnification and viewable area of the workspace. Use the Snap Settings
controls to adjust the grid in the workspace.
Scale About
Center
Select this button if you want the selection box to retain its center point when you resize the box by
dragging its edges.
When the button is not selected, the opposite side of the selection box will remain anchored when
you drag the edges to resize it.
Prevent Scaling
(X)
Select this button if you want to lock the horizontal dimension of the selection box.
Prevent Scaling
(Y)
Select this button if you want to lock the vertical dimension of the selection box.
Tip: If any controls described in this section are not visible on the screen, enlarge the Track Motion window by dragging the lower
right corner until all controls are revealed.
Icon Command Description