Wix studio website full screen

Question:
Hello everyone, when I test my site in the Wix editor, it is surrounded by a few centimeters of white lines, but now that it is online, it is in full screen and the white lines have disappeared. Thank you for your help, I don’t know which settings to change to make the site the same in both cases. Have a great day.

Product:
Wix studio

I think you can only achieve it by changing size of the whole Wix studio editor page. So the interface will be smaller and there will be enough space for preview tab.