Apple Motion 5.1.1 - Manual (Page 270)

Chapter 8 Timeline 270
When you trim a video object in the track area, Motion provides a visual representation of how
much additional footage is available in the object’s source clip: a dimmed extension on either
end of the object indicating that unused frames exist in the source video clip. If you see no
dimmed extensions when you trim an object, there are no unused frames in the source clip.
Consequently, you cannot lengthen the object (unless you change the object’s End Condition in
the Properties Inspector for the clip).
Unused frames
Trim an object
1 Move the pointer to one end of the object you want to trim.
The pointer changes to a trim pointer.
2 Drag the end of the bar until it reaches the frame where you want the object to start or end.
As you drag, a tooltip indicates the new In or Out point, and the new duration of the object.
Trim an object and snap its In or Out point to neighboring objects
m Press Shift as you drag the edge of the object in the track area.
Vertical lines appear in the track, corresponding to the In and Out points of other objects. The
active object snaps to these lines as you drag.
Change an object’s In or Out point
1 Select the object to trim.
2 Place the playhead at the frame where you want the new In or Out point.
3 Choose Mark > Mark In (or press I) to set a new In point or choose Mark > Mark Out (or press O)
to set a new Out point.
Trim multiple objects at the same time
1 Select the objects to trim.
2 Place the playhead at the In or Out position you want.
3 Choose Mark > Mark In (or press I) or Mark > Mark Out (or press O) to set a new In or Out point.
All selected objects are trimmed to the new point.
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