To Use the Control Polygon
1. Select the spline and click 
, or double-click the spline in the Sketcher window. The Spline tab opens.
, or double-click the spline in the Sketcher window. The Spline tab opens.2. In the Edit Type group, click 
Control Points. A control polygon is created around the selected spline.
Control Points. A control polygon is created around the selected spline.3. To continue editing the spline with a control polygon outside of the Spline tab, click 
Control Points in the Controls group.
Control Points in the Controls group.