From the CS-80 V4 manual:
"Multi mode, the ability to assign a different sound to each of the polyphonic voices, an onboard effects chain to supplement the original's built-in effects, independent keyboard management, positioning in stereo space and controllable detuning and circuit characteristics – all lead to a new presentation of this unique keyboard's presence and sonority. This is our vision for CS-80 V4: respecting the past while looking toward the possibilities of the present... and the future."
But there are no further references to multi mode in the V4 manual, and the space formerly occupied by multi mode on the interface is now voice dispersion controls. I'm not seeing multi mode anywhere.
I'm not sure I understand why features that are both (1) really cool and (2) have CS-80 V3 factory presets using them are being culled. Not gonna lie, it feels like betrayal.