Sketch Relations Callouts
In an open sketch, when you double-click a sketch entity in the graphics area:
When you select a relation under Existing Relations 
in the sketch entity PropertyManager, a callout appears in the graphics area.
To display all sketch relations callouts:
Click View and select Sketch Relations.
To open the Display/Delete Relations PropertyManager, double-click the callout .
In the sketch entity PropertyManager, the callouts display the relations applied to the selected sketch entity and the names of the related sketch entities. The color of the callout specifies the status of the entity (under defined, over defined, dangling, and so on).
The default system color for fully defined status is black. In the callouts, fully defined status is blue, the same as for under defined. The other colors in the callouts follow the system defaults. The status also appears next to Information 
in the PropertyManager.
To delete a relation:
Select the relation under Relations, and press Delete.
Select the callout in the graphics area, and press Delete.