JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. To Change the Closure Setting for a B-spline Curve Select the Change Curve Closure tool ( Modeling > Curves > Curve Utilities > Change Curve > Closure ). Select the B-spline curve to edit. The current closure setting for the B-spline curve is displayed, with the reverse setting shown in the option menu. Enter a data point to accept the change. Changing Closure Settings for B-Spline Curves. Left = Closed Curve, Right = Open Curve Parent topic: Change Curve Closure