Improve electrical switches on steering wheel

I drive a lot in early morning and late evening and use very low interior lights to improve my vision. The up/down and left/right buttons on the steering wheel electrical switches would be vastly improved if very small dimples were added to each switch to help you find them in the dark. I like the idea of not removing your hands from the steering wheel, but I can't find the present switches without looking down. I drive a 2013 Focus SE.