thanks for the fast reply.
I havent set any background images for categories so far. I saw theres a possibility to add a “featured image” if I go to “pages” –> then choose the page I want to edit, and then on the right hand side under the permalink mode.
So if would be perfect if I could make settings valid for all categories, so that I only have to upload the featured image for each category. And the category name would automatically appear in the foreground of the picture.
But I am a beginner, I dont know if that is even possible…