Control Polygon
A control polygon is a sequence
of control points (nodes) in space used to manipulate an object's shape.
Dragging control points as opposed to spline points localizes the area
of change, giving you more precise control over the spline’s shape.
To display control polygons by default:
Click Options
(Standard toolbar) or Tools,
Options.
On the System
Options tab, click Sketch.
Select Show spline
control polygon by default.
To display a control polygon:
In an open sketch, right-click the spline
and select or clear Display Control Polygon
- or -
Select or clear Display
Control Polygon 
(Spline Tools toolbar).
To use a control polygon:
Sketch a spline.
Select a control point to activate it 
and display the Spline
Polygon PropertyManager.
Drag the control polygon
to adjust the shape of the spline.
You can also set values for the X
Coordinate 
, the Y
Coordinate 
, or the Z
Coordinate 
(3D splines) in the Spline
Polygon PropertyManager.
If necessary, click
Relax
Spline to smooth the shape after dragging.
Click 
.
Related Topics
3D
Spline PropertyManager
Spline
PropertyManager
Creating
3D splines
Creating 2D
splines