Effect: Combine

Description
Combines two clips together in a variety of ways. This is a more general version of the Blend effect.

Controls

Operation:		Determines how the clips are to be combined: by adding, subtracting, or multiplying.
Image A:		Determines the weighting of clip A.
Image B:		Determines the weighting of clip B.

Notes
To use this effect, place TWO clips of the SAME EXACT LENGTH in the timeline, next to each other. Select the first clip and apply the effect.

NOTE: In previewing, a few frames at the beginning and end of the clip may appear incorrect. This is due to a known bug in iMovie 2. However, the final result using an Apply will be correct in all cases.

Examples

A Clip	B Clip	100% A plus 50% B	100% A minus 50% B	100% A multiplied by 100% B