"Branko Collin" <[EMAIL PROTECTED]> writes:

> Does <image>/Select/By Color what you want?

I think Branko is right here. Color-To-Alpha is not suited for
chroma-keying since it will remove all shades of blue from all
colors in the image. Classic blue-boxing requires to clear only
exactly the color defined as the blue-box background. This can
easily be achieved using Select-By-Color with a small threshold
followed by Clear.  

Salut, Sven
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