Customizing the metamodel : Symbols: Creating and modifying : Adding and changing symbol properties
  
Adding and changing symbol properties
Every symbol represented on a diagram in System Architect has an underlying definition. More than one symbol may share a definition, for example, an Initial State symbol in a UML State diagram, a State symbol in a UML State diagram, and a State symbol in an OMT State diagram share the same definition, OO State. This separation enables a symbol to have instance specific (symbol) properties, as well as global (definition) properties.
In addition, Symbols have properties independent of Definition properties. In System Architect, Symbol properties appear on the last tab of a symbol’s definition.
See also SYMBOL.