Apple Motion 5.1.1 - Manual (Page 525)

Chapter 14 Particles 525
To open a cell’s Particle Cell Inspector
1 Select any cell in an emitter in the Layers list or Timeline.
2 In the Inspector, click Particle Cell (if the pane is not already displayed).
The Cell controls appear.
Single-cell versus multi-cell emitter parameters
If a particle system has only one cell, the Emitter Inspector displays both the emitter parameters
and the cell parameters. In this case, you can control every aspect of the particle system from this
single Inspector, which saves you from going back and forth between the Emitter and Particle
Cell Inspectors.
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