I learned about the mouse/touch toggle from Suzanne B. a couple of days ago! Depending on screen size and resolution it may have a very large impact, I don't know. On my laptop screen it is barely noticeable. I think it only changes the QAT icons. They are slightly farther apart in touch mode; I don't know that they are any larger. Since it is on the QAT drop-down it makes sense that it is only about the QAT.