Spline parameters dialogue box
With end curvature
Here you select that the spline is created with end curvature.
Without end curvature
Here you select that the spline is created without end curvature.
Closed
Here you select that the spline is created closed.
Angle specification
Here you select that the spline is created with angle specification.
Initial angle
The initial angle is entered here.
End angle
The end angle is entered here.
Roughness
The roughness is entered here.
Minimum length
The minimum length is entered here.