If you're constantly using one or two function keys, it's fairly common to do it by memory. For example I can hit the volume and brightness buttons and f5 witho

If you're constantly using one or two function keys, it's fairly common to do it by memory. For example I can hit the volume and brightness buttons and f5 without looking. But really, all the other functions that will become available with the touch bar will more than make up for the time lost looking down.