Object tab menu for xpPushApart.
Ticking this box activates xpPushApart.
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.
Set to Absolute by default.
The alternative setting is Use Particle Radius.