I have found out how to add a custom parameter in parameters list. I also made it as real number so after I add values in the zones settings schedule calculates total value.
However, I can not edit this number from the schedule, nor can I show that number in zone stamp (in zone settings, near content order I can not make the parameter to appear).
I suppose zone script has to be corrected. Could you please show/tell how?
Thank you in advance.