What do I need to do to use the fold tool on a curved line? It seems to only add the fold to a segment of the curve at one time. I can't add the fold to the entire curve in a single click like on a straight line. Thanks.

 

Fold lines won't cut with arc godes (G2/3) but you can select multiple touching lines by using the Shift key. Hold Shift and click on the line you want to mark as a fold. You can also hold the mouse button down and drag to select multiple lines to fold.

 

Thanks for the help. The mouse hold with the centerline worked out better for this particular curve.