How do I display "Click Here for more fields" in the form

I am designing a form that requires applicants to input all the director's information.  I have provided 2 sets of Multiple text fields.  But if there are more than 2 directors, I would want the applicant to click on a button that says "To enter more, click here"

I want to embed these unused text field so that the form would not look lengthy

thank you

Base on what I see on your form design I suggest using the method described on the user guide: 

Show-or-Hide-Multiple-Fields-at-Once-Using-the-Form-Collapse-Tool

You can organized/group multiple fields at once and will make it easier manage them in the Form Builder.

Let us know if you need further assistance.