Grass Valley EDIUS Pro v.7.4 Reference Manual - Manual (Page 329)

Chapter 7 Applying Effects — Setting Effects
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[Convert format] Specify which element of the clip selected as “Key” to be applied as the alpha channel.
[Alpha matte]
Select this item when the clip selected as “Key” includes an alpha channel, and the alpha
channel is applied as the alpha channel for “Fill”.
[Alpha matte (invert)]
Select this item when the clip selected as “Key” includes an alpha channel, and the alpha
channel is inverted and applied to the alpha channel for “Fill”.
[Luminance matte]
Select this item when applying the luminance lever (0% to 100%) of the clip selected as “Key”
is applied to the alpha channel for “Fill”. Luminance level 100% is transparency 100%.
[Luminance matte (invert)]
Select this item when applying the luminance lever (0% to 100%) of the clip selected as “Key”
is applied to the alpha channel for “Fill”. Luminance level 0% is transparency 100%.
[Repeat last frame] Check this item to complement by repeating the last frame in “Key” clip (or the alpha channel),
when the duration of the “Fill” clip is shorter than that of “Key” clip.
5)
Click [Save].
f Click [Cancel] to cancel the saving procedure.
f The created clip is automatically registered in the bin window when saving is completed.
6)
Composite the clips by laying them on the timeline.