# Classification

## How to Display the Sub-Classes of a Class

| ### 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.
| Click the Subclasses tab. A list of classes one hierarchy level below the selected class CLS-1000 Bolts is opened. The Child field contains the number of subclasses for this class.