As in v3.60~53 (and perhaps even before), the custom shape points of a tank cannot be deleted in gui-v2. In gui-v1 it works fine.
thanks @PF_1 , we’ll look into this
I can delete my custom tank points but only set them up to get around a sensor (that per the manufacturers recommendation on a waste tank) that the sensor not go all the way to the bottom of the tank and Victron’s O% & 100% are implied rule. I wanted to just delete this whole custom setup or change to rectangular but appear to have no options for either.