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.
Since you never mentioned which specific report you're referring to, I'll just list a compendium of guides where you can see all the reports in detail and how to customize them.
Complete guide: How-To-Create-Form-Reports-in-JotForm
The guide above lists all the available reports and each will link to another guide tackling them separately.