The diagram type can be changed to another type of diagram if both diagram types are compatible.

Uses for changing the diagram type:

• To migrate with existing project to a diagram type which was not available until then. For example, migrating a Class diagram to the SysML Block Definition diagram.
• To migrate with existing project from the diagram type, which will be erased from your project. For example, if the user has decided to erase a plug-in, they would need to convert that plug-in's specific diagram to standard diagrams. 

Diagram conversion scenarios:

• Any static diagram can be converted to another static diagram. 
• Any dynamic diagram can be converted to another diagram, if and only if both diagrams are based on the same diagram type and both diagrams are compatible.

To change the diagram type

1. Select one or more, of the same type, diagrams in the Model Browser (Containment or Diagram tree).
2. From the shortcut menu, choose Refactor > Change Type To. In the open dialog, select the desired diagram type.