I am using the the latest version: 3.2.0, and am using the PGF backend, as described here:
When I save the figure, I get a warning that says:
User warning: steamed pgf-code does not support raster graphics, consider using the pgf-to-pdf option.
I have no idea what that means, and I can’t find anything like that in the documentation. Can someone tell me what I might be doing wrong?