I'd like to design a form that professors can enter their booklists on. However, I don't know whether they'll be recommending 1 or more books. Can a button add a new <textbook> field if they need more than one book for their course. The maximum number of textbooks I've had for a course 15 and I wouldn't want 15 text fields arranged down the form.
We don't have any way to have a button that would add new books is this manner. You would either have to show all 15 fields or use show/hide field logic to show them in chunks:
Show 5 fields
Have a check box that says "Click here to add more"
Clicking checkbox will show 10 more fields
Hope that makes sense