Resizing background image

Site url: https://www.de-basis-plantaardig.be/

Hello, I am trying to resize the background image on the each page of a website I have created. Right now the image gets cropped seeing it on a big monitor. Can anyone help with any coding as to fix this. Any help would be greatly appreciated. Thanks

I'm not sure you can fix this with coding, but if you placed the book as an image on it's own image block with the title text above in a text block and the paragraph below the book in another text block and then the button, you will have much more control over how these elements interact and stop the button from overlapping the text in the image.