I just got a new Macbook Pro and f5 and f6 are used for the keyboard backlight. I don't need f6 but I'd like f5 to refresh the browsers. In preferences I can switch the f keys to be the default, but I just want this for f5. Does someone know how to do this? Edit: I know command + R does the same, but I'm used to f5 so if it's possible.