To create a cusp

1. Select the object that you want to reshape.

2. In the toolbox, click the Edit Tool .

3. Click Reshape Curve on the menu.

4. Select an anchor on the curve.

5. Click the Unlocked Cusp button .

6. Drag one of the control points. Half of the cusp is formed.

7. Drag the second control point to create the second half of the cusp.

To lock or unlock a control point, press and hold SHIFT while dragging the point. The locked or unlocked status of the point switches while the SHIFT key is pressed.