Apple Motion 5.1.1 - Manual (Page 265)

Chapter 8 Timeline 265
Add multiple objects to the Timeline track area
When you drag more than one item to the Timeline, the new layers appear in their own tracks
above any existing layers. This is equivalent to performing a composite edit with a single
object. A drop menu lets you choose whether the additional layers should be stacked up as a
composite, or whether they should appear one after another (sequentially).
Sequential edit
Composite edit
Before edit
Add multiple layers as a composite
1 Shift-click or Command-click to select multiple items in the File Browser, Library, or Media list,
then drag them to the Timeline track area.
2 Drag to the frame where you want the new layers to start, holding down the mouse button until
the drop menu appears.
3 Choose Composite from the drop menu.
Multiple layers are added to the project at the same point in time, each new layer on its
own track.
If you release the mouse button in the Timeline track area before the drop menu appears, a
composite edit is applied by default. Alternatively, you can drop the multiple layers into the
Timeline layers list. Doing so results in a composite edit.
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