Arc Offset

The Arc Offset tool will replace any line, polyline, spline, Bezier curve, or arc, with an arc with a fixed offset from the chord line. The offset is the distance from the midpoint of the arc to the line between the start and end points. The chord length will be the start and end points of the selected element.

Select the Arc Offset tool on the ribbon or press Shift + U.

Set the offset value. Mouse over any candidate for a replacement to see a preview. Click the element to accept the replacement.