[Gimp-user] Interactive B&W Conversion?

[Paul Waldo]

Hi all,

I am looking for a plugin that will help me convert a color image to
Black and White.  I have looked at the Plugin Registry and found a
couple that do this, but they are not interactive.  I would like to see
for example, the difference between a yellow filter and a red filter
are, and toggle back and forth between them.  Is there anything out
there that will do that?  Did I just miss it in the registry?  Thanks in
advance!

Paul