Soft Key to Spill a Specific DCA

I’m afraid it is right in front of me, but I’m not seeing it… Is it possible to set a soft key to Spill a Specific DCA?

Mix button of the DCA

If you assign a soft key to be a DCA mix button then activate DCA spill, then yes. You can do it. I use an ip8 connected to my D-Live surface as DCA faders only. I have them spill to the surface. Really great and simple operation.