Don't know how to describe it more clearly in the title, but I wanted to show a picture full-size (as it would be shown when clicking on a tumbnail) to start my website with. However when I turn that option on, then all other folders start with a full-size image too.
I would love to have an option to show the image full-size when someone visits my website, but show the tumbnails when they browse the folders. Then I can put an image in the /content/ folder and this folder doesn't show up in the gallery menu