What is a default symbol?

A default symbol is the object symbol that is used to represent the object if users insert an object of this type into a model. You specify default symbols for object types and model types.

Object types

If you assign a single object symbol to an object type, you do not need to define a default symbol. You must specify a default symbol for each object type that can have multiple occurrences in a model, that is, the object can be displayed using multiple object symbols. In this case, the default symbol is displayed automatically when users place the object in a model. Users can add any other object symbols for modeling that are available for this object.

If the object definition has no information about the default symbol, the default symbol specified for the model type is used to create occurrence copies in a model.

Model types

If no default symbol is specified at an object type, the model generation function and the function for creating an occurrence copy use the default symbol specified for the model type.