Apple Motion 3 - Manual (Page 340)

340 Chapter 4 Using the Timeline
To place one group inside another:
1 Drag the group icon in the Timeline layers list onto the group inside of which you want
to nest it.
A black border highlights the destination group.
2 Release the mouse button.
The first group is now nested inside the second group.
You can also select the objects you want and choose Object > Group (or press
Command-Shift-G).
Note: There is no limit to the number of groups you can nest.
To return a nested group to its original state:
m Select the nested group, then choose Object > Ungroup (or press Command-
Option-G).
The nested group is restored into individual objects. Any group within another group
can be ungrouped.
To remove a group from within a nest:
1 Click the group icon in the Timeline layers list.
2 Drag the group out of the existing parent group to the area above the highest track.
The position indicator appears.
3 Release the mouse button.
The group is restored to primary group status.
To delete a group or object track:
1 Select the group or object in the Timeline layers list.
2 Press Delete.
You can also Control-click an object, then choose Delete from the shortcut menu.
All of the operations just described can also be performed with multiple tracks. For
example, rather than just moving one object from Group 1 to Group 3, you can select
two or three objects within Group 1 and move them all at once.
To select more than one object or group track:
m Command-click each of the tracks in the Layers list that you want to include in your
selection.