Types of display for the diagram edges.
| Constant | Value | Description | 
|---|---|---|
| esriLayoutRegularEdge | 0 | The diagram edges will display without any refinement. | 
| esriLayoutOrthogonalEdge | 1 | The diagram edges will display with right angles. | 
| esriLayoutCurvedEdge | 2 | The diagram edges will be curved. |