On UEI remotes (such as OneForAll), all buttons are accessible through the use of
994 style keymoves. So if you use a particular setup code for your Myth, and not every button sends a signal, you can manually program the inactive buttons to send a signal. Of course, some setup codes have more active buttons than others, so you should use the
Lookup Tool to find a well-populated setup code, and manually fill in the inactive buttons with unused EFCs.