You can constrain a style spline by dimensioning line segments in the control polygon.
To constrain line segments in a control polygon:
- In an open sketch, click Smart Dimension (Dimensions/Relations toolbar) or .
- Click a line segment in the control polygon.

- Move the pointer to show the dimension preview.
- Set the value in the Modify dialog box and click
.
You can continue to place more dimensions, such as angular dimensions.
