Wouldn’t it be so cool if we could tell which backgrounds go with which story of ours we’ve written? It’s difficult trying to find a certain background for a story you’re currently writing when you’ve got million backgrounds used in previous stories.
For example, let’s say I have a circus background for a story of mine called “Trapeze Act”. The circus background would be categorized within that story. It could especially work if you have a bunch of stories with different backgrounds! Same with overlays!