I am learning how to use Gimp 2.0, and being a former (chemical) darkroom
enthusiast, I am playing with obtaining b/w images from color ones.
The problem I encounter is that the "Channel Mixer" dialog shows a preview
of the resulting image that is very small - too small to have a clear
idea of the result. How can I change the size of that preview? I tried
with the "preferences" menu, changing the "Interface"/"Previews" item, but
it had no effect.
If this matters, I am using the following version of Gimp: 2.0.4-1
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