How do I change the photo at the top of pages?

There is a photo at the top of all of my pages, other than the home page, and I'm not sure how to change it — it's not a featured image, and I can't find the setting through customize, or other menu areas. I'm an advanced WordPress user, this is my first time with GeneratePress. It's definitely a simple change, I just don't know the term you use for this image, or image location, so I can't do a search.

I'm using the Java theme, it's the cafe picture at the top here behind the page header.
https://learnfilm.photography/articles/

Thank you!