Opening a requirement diagram (SysML)
1. In an appropriate pane, locate the Requirement Diagram you want to open.
In the 
Requirements pane, all Requirement Diagrams are listed in the requirementDiagram folder.
Requirements pane, all Requirement Diagrams are listed in the requirementDiagram folder.2. Right-click the Requirement Diagram you want to open, and then click Open.
Alternatively,
Double-click the Requirement Diagram you want to open.