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Re: Changes 2009-07-15/16 in branch?

From: Richard Stallman
Subject: Re: Changes 2009-07-15/16 in branch?
Date: Mon, 27 Jul 2009 13:41:04 -0400 
    What I'm concerning about with respect to the GNU policy is the
    "alpha-component" (or maybe "alpha-channel" is more familiar) support,
    which was added only for Cocoa.  Alpha-component/alpha-channel
    controls translucency of colors by specifying how opaque it is.

Is this a feature users might actually want to use?
I don't see what it is good for.
Can someone explain what a user might want to do with this?
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