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is there a site where I can get more Visual Styles for the Diagrams? I like those Visual Studio Styles, but maybe there are some more, which might also look very good.
What about enhancing Diagram Styles, so that they can also look like Diagrams of the Tool yUML (http://yuml.me/diagram/scruffy/class/samples)
Sorry, I don't know any site where you can download more diagram styles.
yUML is very pretty indeed, but is very special and would be hard to implement. Anyway, thanks for the tip!