Apple Final Cut Pro 5 - Manual (Page 742)

Chapter 22 Refining Transitions Using the Transition Editor 407
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The name of each clip is at the top of each display and the timecode for the transition’s
start or end point is visible at the bottom of each display.
Trimming the Duration of a Transition
When you move the pointer to either edge of a transition in the Transition Editor, it
changes to a Resize pointer. You can then change the duration of the transition,
depending on how much clip overlap is available.
To change the duration of a transition:
1 Open the transition in the Transition Editor.
2 Do one of the following:
 Enter a new duration in the Timecode Duration field, then press Return.
 Drag the beginning or end of the transition to the desired length. When you do this
to a transition centered at the edit point, both sides of the transition change
duration, but the edit point itself doesn’t move.
The start point of the
transition in the
outgoing clip
The end point
of the transition
in the incoming clip
Drag either end of the transition
to the desired length.