Apple Motion 4 - Manual (Page 671)

Further, different parameters are also available depending on the selected arrangement
for the shape. In the following image, notice that the Columns, Rows, and Tile Offset
parameters are replaced with the Points and Offset parameters when the rectangle
arrangement is changed from Tile Fill to Outline.
Very different looks can be achieved by changing only a few parameters.
As with any effect in Motion, replicator parameters can be keyframed in order to change
a pattern’s dynamics over time. For example, you can create a wave of dots that follow
one another across the screen by keyframing the replicator’s Offset parameter.
671 Chapter 12 Using the Replicator