Apple Motion 3 - Manual (Page 994)

994 Chapter 11 Working with Generators
The size of the gradient and its bounding box are scaled down.
4 With the generator still selected, do one of the following:
 Press E.
 In the Toolbar, click the Make Particles icon.
Once an emitter is added to the project, the following occurs:
 In the Layers tab, the Emitter object appears selected.
 The generator object (the Soft Gradient) becomes an emitter source for the new
particle cells.
 The original reference object (the Soft Gradient) is disabled.
 In the Canvas, the emitter bounding box appears, which can be transformed using
the onscreen controls or 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, it is actually the bounding box for
the emitter.
 The Emitter HUD is displayed.