Where are the opacity map presets for CC Particle World in CS5 and CS6? In versions of After Effects prior to CS5, there are opacity map presets such as Fade In, Fade Out, Constant, etc.

I can see Opacity Map under Particle in the CS6 CC Particle World, but how do I get the presets?
In the newer versions of CC Particle World the opacity map presets have been removed.  

The only way to set opacity now is by drawing a curve on the graph.  See screenshot below: