Centering background image on a form

Hi, this is a question I'd like to know the answer too. Please can you specify the imaze size for the form background? You know, like 600px x 800px for example? I can't get my image right on the center but I don't want it to be repeated. Please let us know.

We cannot provide you with the exact dimensions since the form layouts are different.

Are you referring to the next form?

https://form.jotform.com/form/53176433403955

Could you please explain how exactly would you like to position the background image? Then, we will see what we can do in this specific case. Thank you.