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.
Are you referring to HTML Table Listing Report?
If your report is located inside of your form you can edit the the width of the iFrame report table by editing the html element. On the text field, just click the "HTML" button then put the value on the width of the iFrame.
You can also set the width of your Table Listing Report when you are creating it.
Hope this will help. Let us know if you need further assistance.