Adding a requirement to a diagram (SysML)
1. In an appropriate pane, locate the Requirement you want to add to the diagram.
In the 
Requirements pane, all Requirements are listed in the Requirement folder.
Requirements pane, all Requirements are listed in the Requirement folder.2. Drag the Requirement from the appropriate pane to the diagram.
Alternatively,
1. On the diagram's tab, click the 
Requirement button.
Requirement button.2. Right-click the diagram in free space.
3. From the dialog, select the Requirement you want to add, and then click OK.