I'm using the TinyMCE Advanced plugin so that I can add my own custom styles to the Style dropdown in the Visual Editor. However, I don't want some of the styles that are included in the style.css file to be listed there, as they are 'internal' classes (for aligning pictures etc).
Is there a way to stop these classes being shown in the dropdown? Either by changing the TinyMCE Advanced configuration, or by editing the CSS file in a certain way?