To view Tree Defintions then select the Edit Menu and the next to last item on the menu.
The Tree Definitions form below will appear. Do not change the defitions which come with the product.or you will void all support agreements. This is more informational so you can understand how the product works and how to build filters.
Tree Menu Defintions are a similar concept. Do not change the menus which come with the product or you will void your support agreement. These will also explain more about how the product works internally. I think this open design helps people understand the product better.