Closed Spline (2D)
- On the 
 tab, in the Lines
        group, select 
Smart > 
Closed Spline - Vertex
            G4, G4Plant
Line > 
Closed Spline - Vertex BD, InD
Closed > 
Closed Spline - Vertex ED, HD
 - Select the line properties. 
        Line Properties - Click the line's control points. Click at least 4 points but no more than 20 points for the curve.
 - Select Confirm.
 
 You can click a diagonal by clicking two
      points, if the points will not be at the same horizontal or vertical axis.

