Apple Final Cut Pro 6 - Manual (Page 930)

Chapter 7 Using the Voice Over Tool 145
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Defining the Recording Duration and Destination Track
Before using the Voice Over tool, you need to specify the duration you’re recording and
the destination audio track (where clips recorded with the Voice Over tool will be
placed in your sequence).
Setting the Recording Duration
You can define the recording duration by setting In and Out points or positioning
the playhead:
 If both In and Out points are set in the Timeline: They define the duration of the
recording. (This is the easiest method.)
 If no In point is set: The position of the playhead defines the In point, and recording
continues to the Out point.