Add an Arc or Spline Length Constraint

  1. Select Sketch | Constraints | Add arc or spline length constraint.
  2. Select an arc or a spline.
  3. Select the position of the dimension.
  4. Edit the data in the Edit constraint dialog box.
  5. Select OK.
  6. 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.