Increase or decrease the size of nodes relative to each other
Sometimes it would be helpful to describe relationships for parent nodes or key ideas to be represented by larger nodes than derivative or "child" nodes or ideas. Increasing or decreasing the size of the boxes relative to each other would be a good way to represent that relationship conceptually.
this is now supported using the new drawing engine, which allows users to define default sizes, colors, fonts etc for nodes. For more info, see http://blog.mindmup.com/p/custom-css-styling.html
we plan to work on this feature more over the next month and reduce the dependency on CSS. At the moment, styling the map requires a bit of CSS knowledge.