> Then put the "edit guidelines" button next to the "show points" button. Same basic idea.

That could work, I guess it is similar in effect to show points. But I hestitate to add a new button there for it, the Edit palette is already getting quite crowded. It seems like a more general purpose "Lock/Unlock" type mechanism that worked both on construction lines as well as other objects would be better than a button devoted just to editing construction lines alone.

- Michael