JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. Modify Arc Radius Used to modify the radius, sweep angle, and center of a circular arc. The endpoints do not move. You can access this tool from the following: Ribbon: Drawing > Home > Placement > Arc Tools split button Toolbox: Arcs Key-in: MODIFY ARC RADIUS To Modify an Arc's Radius To Modify an Arc's Radius without Changing the Center or Sweep Angle Parent topic: Arcs Toolbox