JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I'm sorry, but I don't fully understand your question.
Are you maybe referring to a dynamic textbox which can be used to add more fields dynamically in your form? If not, please provide us an example so we can better understand what you want to accomplish.