Apple Motion 4 - Manual (Page 619)

Drag the Emission Range slider (above the sphere) to define the range of degrees at
which particles are generated. In other words, this control defines the size of the cone
that the particles fill when generated in 3D space.
Particle Emitters and the Properties Tab
Emitter parameters can be modified in the Properties tab of the Inspector like any other
object in Motion. The following sections briefly discuss using some of the parameters in
the Properties tab with a particle system (not all parameters in the Properties tab are
discussed). For more information on the Properties tab parameters, see
Parameters in
the Properties Tab .
Note: When a particle cell is selected, only the Timing parameter appears in the Properties
tab of the Inspector. This allows you to control the In and Out points of the particle cell.
Important: Some operations that can be performed in the Properties tab, as well the
application of certain filters or a mask, cause a group to be rasterized. For more information,
see
About Rasterization .
619 Chapter 11 Working with Particles