Hello
I wish to know if it possible to hide some extra fields in frontend leaving them active.
I creted a form where user can add their data, I want that some of them will be visible only for administrators.
How to?
thanks

Hello I think you should use css for this.
Since there is not access level per extrafield you can use a jQuery script to remove them from the DOM.
Do not set them as required because the form will never be able to submit.