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'm not sure which spaces you are referring to on your JotForm. The line spaces seems to be okay as I check your JotForm. However, if you still want to reduce the line spacing you may reduce the vertical padding in Line Layout section from the form designer.
Let us know if you are referring to something different. We will be happy to help.