Rotate emitters in Matinee

So I’m trying to solve a tricky issue of putting ribbons onto orbiting particles and several have suggested rotating the emitter. I was told you can do this in Matinee, unless someone else knows another way. I’m wondering how you can access the emitter that way in Matinee?

On a sidenote: I’m wondering how the example of the Point Gravity is able to make those particle orbit cleanly in one direction on the documentation page. When I tried it out it only offers a push/pull action.

Point Gravity Documentation Example