how do you add back a feature line to a surface. I was working on a surface, made some changes, deleted some things and several of my feature lines
were no longer acting as breaklines, but only a portion of the feature line. I tried adding it back to a surface but it said it was already added. but it was clear that
a portion of it was not breaking. I wound up just deleting them and recreating them and then adding back to the surface. seems like there should be a better way.