Does anyone know how to control the flat rides on a Mac?

I know, that this might be totally beginner-level, but does anyone know how to control the flat rides on a Mac? I can change the views, onride/offride and the lights, but how do I control the ride movements?

not all flat rides can be operated, but if they are, you should see something to change it to manual mode and the specific keyboard controls by pressing the "h" key. hope that helps.

Its about 1 1/2 years after he asked this. I think he did found out by now.