Authors – full name not nickname

I don’t know what you mean. Do you mean you have a taxonomy called Author? If so why don’t you insert the nicknames as the terms?

Sorry then, I thought that your plugin allows by default to sort articles by author.

Yes, you can sort the post by author. In the form setting page -> Result Page Setting section, you can choose ‘author’ from the orderby dropdown list.

Yes, I understand that clearly, but when I choose ‘author’ it displays authors nicknames – you can see it there under label “Autorzy”: https://bosonamacie.pl/wszystkie-artykuly-2 All that I wanted to do is to show Full name instead of nickname as I have it now ??

How do you create the taxonomy ‘author’?