Apple Motion 5.1.1 - Manual (Page 716)

Chapter 18 Generators 716
After you add an emitter to the project, the new “Emitter” object is selected In the Layers list; a
duplicate of the generator object (the Soft Gradient) becomes an emitter cell for the new particle
system; and the original source object (the Soft Gradient generator object) is disabled.
In the Canvas, the emitter bounding box appears. You can transform the bounding box using
the onscreen controls or controls in the Inspector. The particle appears in the Canvas in the same
location as the original object. Although it appears as if the particle is selected, the bounding
box for the emitter is selected.
5 Press the Space bar to play the project.
Soft gradient particles are emitted.
67% resize factor