JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. Modify Arc Axis Used to lengthen or shorten an axis of an arc. You can access this tool from the following: Ribbon: Drawing > Home > Placement > Arc Tools split button Ribbon: Modeling > Home > Placement > Arc Tools split button Toolbox: Arcs Key-in: MODIFY ARC AXIS Note: If the sweep angle is less than 90°, only one axis can be modified. To Modify an Arc's Axis Parent topic: Arcs Toolbox