Grass Valley EDIUS Pro v.7.4 Reference Manual - Manual (Page 330)

Chapter 7 Applying Effects — Setting Effects
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[Track Matte]
Generate alpha (transparency information) from the clip placed on the timeline as a matte clip, and multiply it by alpha of the clip placed as a
source clip. In addition, you can place it overlaying the background image.
1)
Place a clip to use as a matte clip on a track.
2)
Place a clip to use as a source clip on a track on the matte clip.
3)
In the folder view of the [Effect] palette, click the [Keyers] tree.
4)
Drag and drop [Track Matte] to the mixer area of the clip.
f Clips with key effects applied are displayed with an orange line.
1 Alternative
f Select a mixer of the clip on the timeline. Select an effect in the [Effect] palette, and click [Add to Timeline].
f Select a mixer of the clip on the timeline. Right-click an effect in the [Effect] palette, and click [Add to Timeline].
f Select an effect in the [Effect] palette and right-drag it to the mixer of the clip on the timeline, and click [Add] or [Replace]
5)
Display the [Information] palette.
f “Showing/Hiding [Information] Palette” (w page 333)
6)
Click [Track Matte], and click [Open Setup Dialog] in the [Information] palette.
f The [Track Matte] dialog box appears.
“[Track Matte] Dialog Box” (w page 331)