Change Structural setting for object symbol
You can decide whether an object symbol in a model represents a basic object or a satellite. Basic objects are mandatory model objects transporting information that is distinctive for the model. Basic objects build the typical structure of a model. Satellites contain additional information.
Click
Application launcher > 
Administration. 
Configuration is displayed.Click Conventions.
Click Object symbols.
Click the entry that you want to change. You cannot modify entries of the Default (not configurable) type. Use the
filter to find a list entry.Click Used in model types.
Select an editable symbol and click
More.Click Enable 'Structural' or Disable 'Structural', as required.
Click Apply.
The setting is changed.