Is this in any way possible? This would make so much sense and would be super useful.
Here is something you can do (at least in OS X):
Interesting but not really what I was looking for. I am referring to the new FM14 button bars.
Well, this is the label calculation for a button bar segment.
Looks like a transparent button bar with calculated containers underneath.
Now I see it. you have to use it as text with the image as a font. Might not work out for me, but will try.
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