Apple Motion 5.1.1 - Manual (Page 272)

Chapter 8 Timeline 272
Split tracks
You can divide a single object into multiple objects, each in its own Timeline track. Splitting
tracks lets you turn one object into multiple pieces and then manipulate each segment of the
object on its own track. For example, you can split an object into multiple tracks over time if
want to apply an effect to the object over a specific, finite segment of time. Or you might split an
object into multiple tracks to create the illusion that the object is moving in 3D space, passing in
front of other objects. When working in 3D, you can even split camera tracks.
After Split
Before
Split an object
1 Select the object to split.
2 Place the playhead on the frame where you want the split to occur.
3 Choose Edit > Split.
The object is broken into two pieces, each positioned on its own track.
67% resize factor