Yes, but it's an easy task. they keyboard will remember them. Just use the left arrow to choose ctrl map, turn the main knob to select the one you want (name them to keep them organised) and then push in the knob (for enter) and thats it selected.

Also remember you have more than 8 buttons. All the transport buttons are useless as transport controls so you could assign voices there too, and the Bank buttons B1-B4 too.