In this chapter, you have seen how to create an object using the Visualize or CreateObject function. Objects can also be created from plotting functions using the DisplayFunctionVisualize option. Objects may be manipulated using the SetOptions function. Objects and Models can be created and destroyed using the functions CreateObject and DestroyObject, respectively. A model acts as a spatial container for a collection of objects. The model range affects the spatial extent of the model. The model range can be set explicitly, but it may change automatically when objects are created or the last object inside a model is destroyed.