CategoryMenu show only children

I'm trying to display categories that are children of a specific category in a CategoryMenu but I can only see how to do this and show the parent category. I'm setting the StartingCategory to the Parent category, wildcards do not seem to be supportedIs there an obvious setting or style that I'm missing?My Categories are like +Parent * Child 1 * Child 2 * ... * Child 100I want the treeview to only show * Child 1 * Child 2 * ... * Child 100