Apple Motion 4 - Manual (Page 618)

• Speed (2D only): Drag inside the emission control to shorten or lengthen the arrows to
define how quickly particles move away from the emitter.
Use the following modifier keys to more precisely manipulate the graphical emission
control in the HUD:
• Shift (while adjusting Angle): Restricts angles to 45 degree increments.
• Shift (while adjusting Range): When working with a 2D emitter, restricts to 22.5-degree
increments.
• Command: When working with a 2D emitter, adjusts Angle only.
• Option: When working with a 2D emitter, adjusts Speed only.
Emission Latitude/Emission Longitude Control (3D only): When using a 3D particle
emitter (when the 3D checkbox is selected in the Emitter tab of the Inspector), the emission
control of the HUD lets you modify the Emission Latitude and Emission Longitude
parameters.
Emission Latitude and
Longitude control
Drag the sphere in the center of the circle to modify the emission direction (in degrees
latitude and longitude) of the particles. You can also enter specific values in the Emitter
tab of the Inspector.
618 Chapter 11 Working with Particles