You can turn off dynamic animation for selected particle objects and rigid bodies. This is useful when you work on other objects of a scene and temporarily want to avoid unnecessary calculations that slow animation. The motion of keys and other nondynamic objects is unaffected when you disable dynamics.
To disable dynamic calculations for selected particles
For emitted particles, select the emitted particles rather than the emitter. For a soft body, select the geometry or the particles.
To disable dynamics for all rigid bodies controlled by a solver
This turns off the effect of fields, collisions, and rigid body constraints for the rigid bodies it controls. Remember to turn State on again when you want the rigid bodies to operate again—including rigid bodies you’ve created after you turned off State.