I've been getting some questions recently about creating presets in After Effects. The tutorial on Creating Pseudo Effects shows you how to create the controls, but how do you actually use them to control something?
I thought I'd make a quick video to show how its done. Though the video isn't that quick, you'll see how you can use expressions to link your controls to the properties of other effects. Even if you've never used expressions before, you should be able to follow along. The expressions start out basic, but I also go into some more complex uses as well as some trigonometry in order to keep the ramp effect locked to a layer without having to pre-compose.