What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
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 am not sure if I have understood your question correctly. Do you want to remove the white lined which is being disabled after the form fields? Please check the screenshot below:
Have you cloned this form from templates? You see the white lines because of the several custom css code injected in form.
To remove these lines from your form, please inject the following custom css code in your form:
border: none !important;
The following guide should help you inject custom css code in form: https://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes
Hope this helps.
Do get back to us if you have any questions.