Press the [Edit] key while in "Voice Mode"
Turn knob [A] counter-clockwise until "Common" is displayed in the bottom line.
Turn the [Page] knob to switch to the Arp Type screen.
Use knob [B] to jump to the type parameter.
Now use the [B] or [Data] knob to change the parameter. You can also use the [Inc/Yes] and the [Dec/No] buttons.