You can limit selection sets by property or by object type using filter lists. For example, you can copy only the blue objects in a circuit board drawing, or only objects on a certain layer. You can also combine selection criteria in your filter list. For example, you can tell AutoCAD to include an object in a selection set only if it is a blue circle on a specific layer. Filter lists can be specified for the Select , SelectAtPoint , SelectByPolygon , and SelectOnScreen methods.