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Chapter 10 Using Filters 707
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.
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 allows you to specify a parameter value outside
of the slider’s range. The parameter ranges listed for each filter in this chapter define
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.
The Hatched Screen filter in the Inspector
01112.book Page 707 Sunday, March 13, 2005 10:36 PM