I've got a MacBook Pro, and two Thunderbolt displays. I'd like to be able to change the brightness on them individually, like so:
For the MacBook, I'd use the F1/F2 keys on its keyboard. For the first Thunderbolt Display, I'd use the F1/F2 keys on my USB keyboard. For the second Thunderbolt Display, I'd use CTRL+F1/CTRL+F2 on my USB keyboard, as outlined in this AskDifferent answer.
However: the CTRL+F1/CTRL+F2 keys on my USB keyboard currently map to my MacBook's brightness - so now I've got two ways to change my MacBook's brightness, and zero ways to change my secondary Thunderbolt display.
Is there a way to re-map the CTRL+F1/CTRL/F2 commands, so they control the secondary Thunderbolt display?