Do you want your visitors to sign a digital NDA form?  
  1. Enter admin mode on the iPad (Three finger swipe over the clock)
  2. Select the Custom Forms option
  3. Edit the form that you are currently using
  4. Touch the + icon to add a new field
  5. Select field type "Text Block" and title the NDA field appropriately
  6. Paste the body of the NDA text from somewhere else (you can grab it from an email or website and then cut and paste into the field)
  7. Reorder the field if it's not where you want it to be by touching the reorder button, and then grabbing the handle on the right side and sliding it to the desired location.
  8. Save the form
  9. Activate the form
  10. Exit the admin mode by touching to the left of the admin screen.