Apple Color 1.0 - Manual (Page 309)

Chapter 15 Geometry 309
4 While the playhead is at this initial frame, drag within the center box of the onscreen
control to move it so that the crosshairs are centered on the feature you want to track,
and adjust the handles of the inner box (the reference pattern box) to fit around this
feature.
5 Adjust the outer box to include as much of the surrounding shot as you judge
necessary to analyze the shot.
∏
Tip: For a successful track, the feature you’ve identified using the reference pattern box
should never jump outside the search region you’ve defined as the shot proceeds from
one frame to the next. If the motion in the shot is fast, you’ll want to make the outer
box larger, even though this increases the length of time required for the analysis. If the
motion in the shot is slow, you can shrink the search region box to a smaller size to
decrease the time needed for analysis.
6 Move the playhead to the last frame of the range you want to track, and click Mark Out.
A green Out point appears in the Timeline.