How to reverse command dial for Fujifilm X100s?

Coming from a Canon system where turning clockwise means increase and counter-clockwise to mean decrease in value, I’m having trouble adjusting to X100s’ reversed way. I found an option to do this for the focusing ring, but don’t see anything for the command dial.

Is there something that I missed in the settings? Or is it simply impossible with the shipped firmware? If that’s the case, are there any workarounds (e.g. custom firmwares) for me to achieve what I need?