On a Cinema6(6800) or Cinema7(7800) Any key can "learn" IR commands EXCEPT SLEEP, SETUP, and the DEVICE keys. There is limited learn memory, however. At best you'll get 12-25 keys taught IR commands. The number depends on the IR command length each device uses. If you know how to learn a command to an L key, simply substitute any other key in place of the L key in the learning sequence.

Dave