To Smooth the Spline
1. Select the spline, and then right-click to display the shortcut menu.
2. Click Sketch and then click the arrow next to 
Spline.
Spline.3. Click Edit Spline. The MOD SPLINE and MOVE PNTS menus appear in the Menu Manager.
4. Click > .
5. Type the number of points to average in order to smooth the spline:
◦ Type [1] to keep the spline as is.
◦ Type [3] to average the centermost point out of the group and one point on each side of it.
◦ Type [5] to average the centermost point in the group and two points on each side of it.
6. The resulting spline appears in green. To accept it, choose Accept; to reject it, choose Reject and try again with a different number of points.