It would be very useful if we had a couple of dropdowns that included Children, Methods, and Rules as it is with .net. In .net, it lists all of the methods in the active class. This would be useful in the Design Editor as well as in Visual Studio when you are working with design files.
This would be especially useful on large designs where you may have lots of rules and/or children. You should be able to click on an item (ex. "Length") and the window will jump to that rule.