Modifying Parabolas To modify the parabola: In an open sketch, select a parabola. The pointer changes to when it is over a parabola. Drag the vertex to shape the curve.The pointer changes to when you select the vertex.To flatten the curve, drag the vertex away from the focus. To make a sharper curve, drag the vertex closer to the focus. To change the length of a side of the parabola without modifying the curve of the parabola, select an endpoint and drag. Video: Modifying a Parabola To modify the length of both sides of the parabola without changing the arc of the parabola, drag the parabola away from its endpoints. Video: Modifying a Parabola Without Changing the Arc Click . Parent topicSketching Parabolas Changing Parabola Properties Parabola PropertyManager