Selective Colour Correction has been
significantly improved in SilverFast
6 with the addition of Layers (up to 4) and Adaptive Colour
Correction. We can make selection within our image and so restrict
the colour correction to a specific area or we can apply the correction
to our selected colour across all areas of the image. The two
screenshots shown above depict typical situations. The first (left) shows
that I've selected RED and have dragged increased its value (strengthen).
The second screenshot demonstrates an alternative method of applying a
similar edit to greens. The Selective Colour Correction tool is
very powerful allowing very intricate colour edits to be made on the
image.

Size of Edge Mask for Selection
Masks (Feathering)