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To combine the video images after applying a
shadow
Select Ch1+Ch2 and Ch3+Ch4 using the combiner, then in
the Global Effect >Ch1-Ch4 >Shadow menu (4213), select
[Ch1 Shadow] and [Ch3 Shadow].
To apply a shadow after combining video images
Select Ch1+Ch2+Ch3+Ch4 using the combiner, then in
the Global Effect >Ch1-Ch4 >Shadow menu (4213), select
[Ch1+Ch2 Shadow].