Thank you, Charles. I've spent almost three hours trying to replicate your work and simply cannot. No matter what I do, it either allows formatting on all cells or none. (And when I tried to edit your document to add some proprietary stuff to make it work for my purposes, it stripped out everything you did and once again formatted either all or none.)

I am defeated. Thank you for your effort. Despite my inability to grasp the concept, I am appreciative.