# Classification

## How to Display the Structure Explosion

| ### What to do:
| To work through this example, you must have completed the examples Create a Class and Create a Class Hierarchy / Structure.
| Select Start > Classification > Classes. The Class mask is opened.
| Find the class CLS-1000 Bolts.
| Select from the context menu Structure > Multi level > List. The Class Structure Explosion mask is opened.
| In this window, you can also display the Classification lists for the classes via the context menu.