There is one Split Point that divides the internal keyboard sounds; L = Left, R = Right. Internal sections can be L, R, or LR (across all keys).
Split Point — Determines the note that separates (splits) the left hand section and the right hand section. The Split Point is the lowest note of the right hand section.
The word “Zones” in the CP88 refers to the Master Keyboard function, and uses the term “Note Limits” for the four Zones that transmit Out via MIDI (external controller).