Apple Final Cut Express 4 - Manual (Page 422)

422 Part VI Rough Editing
To determine the duration of a track gap in the Timeline:
1 Option-click the Auto Select control for the track with the gap.
2 Position the playhead in the gap.
3 Do one of the following:
 Choose Mark > Mark Clip.
 Click the Mark Clip button in the Canvas.
 Press X.
The track gap’s duration appears in the Timecode Duration field in the Canvas.
In and Out points set
based on track gap on V1.
Auto Select control
enabled