Applying Behaviors to Filter Parameters
Animating filter parameters is easy using Parameter behaviors. For example, if you have an object with an applied Circle Blur filter, you can randomize the amount of blur applied to the object over time.
To apply a Parameter behavior to a filter parameter
Select the object with the applied filter.
In the Filters Inspector, do one of the following:
Choose Add Parameter Behavior from the Animation pop-up menu (on the right side of the parameter row), then choose a behavior from the submenu.
Control-click the parameter name, choose Add Parameter Behavior from the shortcut menu, then choose a behavior from the submenu.
A behavior icon (a gear) appears in the parameter row, and the Behaviors pane opens in the Inspector.
For more detailed information, see Parameter Behaviors.