A physical button can, too. You make it dependent upon the text on the current screen that’s displayed. The important thing is you can feel the button or dial i

A physical button can, too. You make it dependent upon the text on the current screen that’s displayed. The important thing is you can feel the button or dial itself, not what text is on it. Even when you glance to see where a button is or which button it is (temp or whatever), once you know where it is, your eyes can divert back to the road and you can feel around for the dial or button when you miss it.