Share Email Facebook Twitter LinkedIn To Reverse Lines, Polylines, Splines, or Helixes Click Home tab Modify panel Reverse. Find Select a line, polyline, spline, or helix to reverse. Press Enter to end the command. Related Concepts About Modifying HelixesAbout PolylinesAbout Modifying Splines Related Tasks To Modify PolylinesTo Convert a Spline to a Polyline Related Reference Commands for Editing Specific Objects