Hey Güldem,
Do you mean you’re not seeing the Inline CSS field? Is that screenshot taken from your site or another user’s? If so, would you mind providing us a screenshot of what you’re seeing on your end?
Basically, you’d want the elements in your section to be taller. For example, try adding a Gap element with a height of 100px in your section and you should see that the background image of your section will expand or zoom in.

Please note that using the background image is not always ideal because it’s designed to always cover the section and the section’s aspect ratio can change depending on the flow of the content within it. That will result to parts of your background image to be hidden. If you want to show all parts of the image, it’s best to use the Image element.
Thanks.