Add an Arc or Spline Length Constraint
- Select Sketch | Constraints | Add arc or spline length constraint.
- Select an arc or a spline.
- Select the position of the dimension.
- Edit the data in the Edit constraint dialog box.
- Select OK.
- Add more arc or spline length constraints by repeating steps 2-5 or finish adding arc or spline length constraints by pressing the ESC key or the middle mouse button.