You could do that, on the dial itself.
The reason is the hole in the center is smaller, yet the switches are the same size. On the stock ones, the center knob is slightly smaller on the inside. Don't ask me why Ford didn't make the knobs all the same, nor the Chinese place for making them all the same when they aren't...prolly to make it cheaper AND for lack of R&D. lol.
Daily: Audi S4 b5 | Project: Turbo ZX3