Fist, a ditto to those who have lauded the info and spirit of this thread. 2 problems:

1) I want to erase a few "learned" commands and remap instead to use that memory bank. Followed the manual's "976" advice, but it doesn't tell me when in the sequence to tell the remote what device the key to be erased is "under." I'm not yet desperate enough to try Josh's "980 - erase everything" scorched-earth solution, but need the learning room freed up, because ...
2) I can't find a 4 digit main code for my Denon DRA 1035R receiver. Called RS support, and they suggested I try 0004 or 1104, but neither those nor the 0160 works! This is not that old a receiver ...

A Denon code would be a lifesaver, but I'd settle for some key-by-key guidance on erasing my previously learned keys.

Thanks 1,000,000

Clay