Apple Motion 5.1.1 - Manual (Page 278)

Chapter 8 Timeline 278
You can modify the upper group bar to be longer or shorter than the contents of the group (the
lower group bar). For example, you might shorten the upper group bar to hide a section of the
objects in it. Objects that extend beyond the ends of the upper group bar are not displayed in
the Canvas.
In addition to moving and trimming, you can slip video layers in the group track. Any portion
of the lower group bar that contains only one video layer can be slipped in this manner. Areas
where more than one layer overlap can be slipped by Control-clicking the group bar and
choosing a video layer from the shortcut menu.
Edit in the group track
There are a variety of editing tasks you can perform directly in the group track. This is equivalent
to making similar edits to the various tracks contained within the group, but it is sometimes
more efficient to make such changes in the group track instead.
Move all objects in a group at once
m Drag the upper group bar left or right.
All objects in the group move in time.
Move a single object in a group
1 Click an area of the lower group bar where a single object is visible.
That object is highlighted in the group track.
2 Drag the section left or right to move the object in the group forward or backward in time.
The selected object moves in time.
Move overlapping (composited) objects in a group
m Drag an area of the lower group bar where multiple objects overlap.
The composited objects move in time.
Trim objects in a group
m Drag an end of the upper group bar right or left in the track area.
All objects in the group are trimmed.
Change the duration of the group independently from the objects in it
m Holding down the Command key, drag either end of the upper group bar left or right.
Only the upper group bar is trimmed.
67% resize factor