Apple Motion 4 - Manual (Page 616)

When 3D is enabled in the Emitter tab of the Inspector, the Emitter HUD offers additional
3D controls. In 3D, the emission control modifies the Emission Latitude and Emission
Longitude parameters.
3D Emitter HUD
Emission control
When an emitter and the Adjust 3D Transform tool (in the Toolbar) are selected, the 3D
Emitter HUD expands to display additional controls that allow you to transform the emitter
in X, Y, and Z space, regardless of whether the group containing the emitter is 2D or 3D.
For more information on using the 3D transform controls in the HUD, see 3D Transform
Tools .
616 Chapter 11 Working with Particles