Adding a callout to an item or requirement on a diagram (SysML)
1. On the diagram, right-click the item, point to Add, and then click Callout Note.
2. From the dialog, select the check boxes associated with the compartments you want to show.
3. Clear the check boxes associated with the compartments you want to hide.
4. Click OK.
Note that you can add a callout to an item only when that item has been linked through a SysML or UML relationship.