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Can I use Instant Alpha with b/w images?
I have a b/w image with some grey tones inside a black outline.
I'm trying to use instant alpha in Preview to remove the grey tones - the selection works fine but when I hit the delete key all that happens is that the selected part turns a uniform grey - I want the colour to be removed, ie essentially have that area white.
Does instant alpha only work with colours?
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Linear Mode
