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To apply a regional matte:
1. Open the Video Filters dialog box and place the filter you want to work with in
the Applied filters list box.
2. Click the Region button to open the Region dialog box (not available for all
filters).
3. Select an option from the Mask drop-down list to determine what kind of matte
you want to use.
4. Move the Threshold slider to control the degree of the effect. You can also
choose to invert the area being affected by selecting the Invert option.
5. Click OK to return to the Video Filters dialog box.
Region dialog box
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1 Mask window shows a frame from the mask.
2 Preview window shows a frame from the selected clip and the parts affected by the
filter.
3 Type drop-down box lets you select the key type to use in the Mask window.
4 Mask drop-down box lets you select the kind of matte to use.
5 Enable filter (start position) enables the filter applied to the clip starting from
the current position.
CHAPTER 4: ADDING EFFECTS AND TITLES 119
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