Reply To: custom fields?

I am trying to add a single field called “Sachem Name” to my connections pro plugin on the website. I have looked at and read all your support, including the docs you have emailed to me and nowhere in there does it say, this is how to create an additional field. I have bought multiple templates and the plugin and have put many hours into this. I simply need instructions on how to create ONE additional field. Does that exist???