Hello, I am trying to extract a user name from a related list (Foreing Key with Joomla User), the problem is that the form gives me a number or ID, and what I need is the user name field. In attempting to do so otherwise leave the empty field and formatted text, not as combo.

Please I need help.

Open the node, and select the sub-field.
Works in a form to select an user, or in a list, or in a fly. Always the same idea for all FK's