ABSTRACT
The Expression Controls category of effects contains what is perhaps the most odd group of effects. Other than the effects in the Audio category, most effects make some kind of visual change. Because all of the Expression Controls effects are applied and function in a similar manner, this chapter looks at how expressions can be controlled with them. Then it looks briefly at what each Expression Controls effect can be used for. The Angle Control effect is for controlling properties with angle controls. It has degrees, and can keep track of the number of complete revolutions. The Color Control effect allows to select and animate the color change of a color swatch. This can be used to control the change the color of multiple properties at once. The Slider Control effect is perhaps the most useful of the Expression Control effects, probably because most properties in After Effects work like the Slider effect works.
