xpStrangeAttractors Object tab menu.
Checking this box activates xpStrangeAttractors.
Set at Independent, by default.
You can change this to Action-Controlled.
In this mode, particles will be affected if they come into the field of effect of the modifier.
When in the Action-Controlled Mode setting, the modifier will only act on a particle when told to do so by an action.
This is a link field for an object in the scene.
If used, the movement of the particles will be affected by the position and rotation of the object.
You can use it, for example, to change the orientation of the generated result.