Apple Motion 4 - Manual (Page 669)

Replicators and Cells
All replicators begin with a source layer: the object in your project that will be duplicated
and arrayed onscreen in a custom pattern. When you create a simple replicator—by
selecting the source layer you want to “replicate” and clicking the Replicate icon in the
Toolbar—two new layers are added to your project: A replicator layer and a cell layer.
The cell layer appears underneath its parent replicator layer in the Layers tab and Timeline
layers list. This cell layer is named for the source object. At the same time, the source
object itself is disabled but remains in its original position in the Layers tab.
Replicator
Cell
Replicated source layer
(now disabled)
Once you have created the replicator, you can add additional cells by dragging another
source object from the Layers tab into the Replicator layer, as shown in the image below.
669 Chapter 12 Using the Replicator