The Options setting does not include a combined fn-key mode, for instance, so that the top row only works with F-buttons up to F10 inclusive, while the remainder of F11 and F12 are used to change the volume. This would allow the top row to function with F-buttons, but not with all of them. But because this is the case with me, in theory, having such a setting would make it feasible to change the top row in a manner that offers a great deal of flexibility. There are more keys stored in that location.