Each collection will have its own image. The closest I got was adding an image banner section to the template and then “hiding” the collection banner from the template. But that just populated the same image across each collection.
Hi, for me to span the collection banner, I went to the “default Collection”, “Collection Banner”, and then pasted this code in the “Custom CSS” for that section.
Additionally, you can add this code to “hide” the banner text. Go to “default Collection”, “Collection Banner”, and then paste this code into the “Custom CSS” for that section above or below any other code in there.