Defining a custom object class

Click > Schema Management > Create Class.

Adding optional attributes to a class

Click > Schema Management > Add Attribute.

Viewing class information

Click > Schema Management > Class Information.

Defining an auxiliary class

Click > Schema Management > Create Class > enter a Class name > click Next > Auxiliary Class.

Deleting auxiliary properties from an object

Click > Schema Management > Object Extensions > specify the name and context of the object > click OK > select an auxiliary class extension > click Remove.

Deleting an attribute from the schema

Click > Schema Management > Delete Attribute.