To change the selected points, right-click on Point, select Reset in the context menu and specify the new points.
or 
to confirm your selections and create the curve.
Click
to discard your changes.After starting the Parabola command, proceed as follows.
| 1 | Type drop-down list, select
3 points. |
| 2 | Specify the first endpoint of the parabolic arc, a through point, and the second endpoint by clicking or using Snap. To change the selected points, right-click on Point, select Reset in the context menu and specify the new points. |
| 3 | Click or to confirm your selections and create the curve. Click to discard your changes. |