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.
Once you login into your JotForm account, select the form to edit from My Forms page and then click on Edit Form button to open the Form builder.
Now, you can edit the field or add new fields from here. Please see the screencast below that can help you with modifying your JotForm.
Hope this information helps!