JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Add a Control Point to a Curve Select the Insert Vertex tool (Drawing > Home > Modify > More split button). Select the curve either at the endpoint or midpoint on the curve. Enter a data point to position the new point. Order will be increased by 1 for each vertex added to either the middle or end of the curve. The curve shape may also change. Adding a Control Point to a Curve Parent topic: Insert Vertex