Operation Manual

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Animation and Keyframes
Last updated 11/30/2015
Motion tracking properties in the Timeline panel
Each time you click Track Motion or Stabilize Motion in the Tracker panel (or choose Animation > Track Motion or
Animation > Stabilize Motion), After Effects creates a new tracker for the layer in the Timeline panel. Each tracker
contains track points, which are property groups that store the tracking data after tracking has been performed. After
Effects groups trackers in the Motion Trackers property group for each layer in the Timeline panel.
To show a tracker in the Timeline panel, select the tracker from the Current Track menu in the Tracker panel and press
SS.
You can rename trackers and track points and modify and animate their property values in the Timeline panel just as
you do for other layer properties and property groups. You must click Apply in the Tracker panel to apply the property
changes to the target.
Feature Center Position of the center of the feature region.
Feature Size Width and height of the feature region.
Search Offset Position of the center of the search region relative to the center of the feature region.
Search Size Width and height of the search region.
Confidence Property through which After Effects reports the amount of certainty regarding the match made for each
frame. In general, Confidence is not a property that you modify.
Attach Point Position assigned to the target layer or effect control point.
Attach Point Offset Position of the attach point relative to the center of the feature region.
Adjust the track point
When you set up motion tracking, it’s often necessary to refine your track point by adjusting the feature region, search
region, and attach point. You can resize or move these items independently or in groups by dragging using the Selection
tool. To help you define the area to be tracked, the image area within the feature region is magnified to 400% while you
move the region.