Apple Motion 4 - Manual (Page 954)

In most cases, you interact manually with the parameters of a filter. The following image
shows the Filters tab in the Inspector for the Hatched Screen filter. The Hatched Screen
filter has six controls: Center, Angle, Scale, Skew, Stretch, and Contrast.
Hatched Screen filter in the Inspector
Use the dial, slider, the value slider, or value field to set and enter values for each parameter
as you see fit.
Important: Although the sliders are limited to a predetermined range of values, using
either the value slider or the value field may often allow you to specify a parameter value
outside of the slider’s range.
Using Onscreen Controls
Some of the filters have onscreen controls that manipulate certain filter parameters,
especially position. As you use these controls, the associated parameters will update in
the Inspector.
Keyframing Filter Parameters
Animating filter parameters is easy. The following section shows two ways to change a
filter parameter over time using keyframes.
To animate filter parameters using Record
1 Select the filter you want to animate.
2 Click the Record button (or press A) to enable recording.
3 Go to the frame where you want to add a keyframe.
4 Change the value of the parameter to the desired value.
A keyframe is automatically added with the value you select.
5 Go to the next frame where you want a keyframe.
6 Repeat steps 3 and 4 until you are finished.
To animate filter parameters using the Animation menu
1 Select the filter you want to animate.
954 Chapter 16 Using Filters