ABSTRACT
One of the big limitations of expressions is that they cannot be animated. Let’s say you wanted to simulate an earthquake by applying a Wiggle expression to the Point of Interest value on your camera layer. Once you applied the expression, the wiggling would last for the entire duration of the layer (or, the composition, whichever ended fi rst). Enter the Expression Controls effects, which can be used in conjunction with expressions to create animations. In this case, we could create a null layer and apply the camera controlling expression control effect to the null. As we’ll also see, these Expression Control effects can also be used simply as a visual controller for expressions to make them easier to work with.
