Spline Replace

The Spline Replace tool will replace any curved element (arc, circle, polyline, spline, Bezier curve, or ellipse) with a spline.

Select the Spline Replace tool on the ribbon or press Shift + S.

Set the tolerance you want to use using either the slider or the edit field. When you mouse over any curved element, you will see a preview of a Spline fit within your tolerance. Click the element to accept the replacement.