Apple Final Cut Pro 6 - Manual (Page 132)

Chapter 9 Timeline Basics 131
II
 Duplicate frames indicator: If you use a clip more than once within a single edited
sequence, the duplicated frames are marked by a colored bar appearing at the
bottom of the clip’s video item in the Timeline.
Each separate instance of duplicated frames is color-coded differently. There are six
different colors used to indicate separate sets of duplicated frames: red, green, blue,
white, black, and purple. If there are more than six sets of duplicate frames in your
sequence, these colors are reused. In the following example, the first clip is
duplicated once, as indicated by the red duplicate frames indicator. The second
clip is also duplicated once, as indicated by the green duplicate frames indicator.
Note: If a duplicated instance of a clip has variable speed applied to it, no duplicate
frames indicators appear.
You can adjust the parameters that determine when duplicate frames indicators
appear in the Editing tab of User Preferences. For more information, see Volume IV,
Chapter 23, “Choosing Settings and Preferences.”
You can enable or disable duplicate frames indicators altogether by selecting Show
Duplicate Frames in the Timeline Options tab of the Sequence Settings window. For
more information, see Volume IV, Chapter 27, “Sequence Settings and Presets.”
Duplicate frames
indicator
Different colors indicate
different sets of
duplicated frames.