You use manipulators to direct the particle stream and create a number of different effects, such as a swirling vortex, a swarm of objects orbiting a point, or a waterfall. A particle stream can have an unlimited number of manipulators. Manipulators only influence the particle stream that parents them.
When manipulating particles, you use the Particle Manipulator menu to set a manipulator's type, magnitude, power, and damping properties, as well as position, rotation, and scale. Particle manipulators can be animated using motion paths. You can use the same operations on a particle manipulator that you use on an axis. See
To create a particle manipulator:
A particle animator element is added to the scene and parented by the selected Particle Generator element.