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.
Do you mean to allow your users to add new options to the dropdown list? If so, you may be looking for our User contributed dropdown widget.
If you are referring to something different, please provide us with more information so that we can guide you in the right direction.