Double click in designer-- my aching wrist!

I read here:

http://www-10.lotus.com/ldd/nd85forum.nsf/5f27803bba85d8e285256bf10054620d/a244635d25599a4f8525749600672970?OpenDocument

That something in preferences was going to be included as an option to restore back to single backs.

I went under designer preferences, three times – did I miss it? Is it someplace else?