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.
Yes it is possible to create forms with any orientation or size.
You may want to check on this user guide -The-Importance-of-Form-Widths
Also you might want to check how to inject CSS code to properly set the background color of the form sections as you referenced in your example screenshot.
If you need further assistance, please feel free to contact us.