How to resize the background image for my form?

I am trying to put a background picture in my form but I cant seem to find the right size. By any chance, is there a way to automatically scale the image? Or do you have the right dimension so i can resize my photo? Thanks!

Edit: I just checked now, the background image works perfectly for my 2nd and 3rd page. But it doesnt quite fit on my 1st page. Can I do something about that? I really want this photo.

https://form.jotform.com/202175988120052

The image being used on your form is too big in size and it might affect the form loading time. You may try reducing the file to less than 50% of current size and add it again as the page background.

You may set the page background image as a cover and fixed from the Advanced Form Designer so that the form can only be scrolled. Please see the screencast below:

Please give it a try and let us know if you need any further assistance. We will be happy to help.