To quickly add new properties to an object, use the dialogs available from the property sheet menu. Properties added to an object are available for all other objects of that type.
Adding a New Attribute to an Object
If the standard PowerDesigner attributes are insufficient for your modeling requirements, you can add new ones using the New Attribute dialog available from the property sheet menu.
Adding a New List to an Object
Many PowerDesigner objects are associated with multiple instances of another type of object. For example, a table can have multiple columns, a class can have many operations, and a person can be in many groups. You can model new kinds of associations by adding new lists to your object property sheets.
Managing Extensions
To review your object extensions in the Resource Editor, select Manage Object Extensions from the property sheet menu.