Creating items on an MBRE traceability diagram (MBRE profile)
The MBRE Traceability Diagram is a PTC proprietary diagram that is available only when the MBRE Profile has been added to a model.
You can create items of the following types on an MBRE Traceability Diagram: Activity, Actor, Block, Class and Use Case.
For information about creating Variability items on an MBRE Traceability Diagram, click here.
To create an activity, actor, block, class or use case
1. In Modeler, open the MBRE Traceability Diagram.
2. On the diagram's tab, click the 
Activity, 
Actor, 
Block, 
Class, or 
Use Case button.
Activity, Actor, Block, Class, or Use Case button.3. On the MBRE Traceability Diagram, click in free space.
4. Type the name of the item, and then press the Enter key.