The "Button Dance" has been out for a few years for the M8, and "RAW" mode gives true uncompressed output. That is a real advantage for the M8, as it only supports 8-bit DNG. The M9 and M Monochrom support 8-bit and uncompressed DNG. Now, the "Button Sequence" for unlocking the DEBUG screens for the M9 and M Monochrom have been discovered. Here they are- tested them on my cameras. Delete once up twice down four times left three times right three times info once Use "SET" as you normally would for shooting modes, RAW modes are listed. I don't plan on using RAW mode as I use uncompressed DNG. But some other stuff looks fun.