CM Onscreen Buttons HTC One

I was wondering if anyone knew if there was an official way to enable the onscreen buttons on the HTC One (T-Mobile model, if that matters) in CyanogenMod. Basically, the button layout seems like the main thing I don't like, and I'd like to be able to use onscreen keys. Does anyone know if this is possible, or do I have to go in and muck around with Root Explorer or the like?