User blog comment:Unrulyruby100/Hey look! Policy updates! Categorization and image sourcing/@comment-16241899-20140124160602/@comment-27202257-20140124172948

That is a very good question and thank you for pointing out that not everyone lives inside my head. XD I think the best way to define a screenshot would be as a picture of a moment in time, or a specific environment. So this would be a screenshot while this would not. I do feel though that Screenshots is going to be a very board category by nature (so if anyone has any ideas on how to refine that tree further, any at all . . .) so don't worry too much and if you feel like something works as a screenshot, mark it. We'll be refining it over time I'm sure.

In the case of those Granny Rags photos you mentioned (lol, Granny Rats) I would say they could be categorized in both Category:High Overseer Campbell/screenshots and Category:Vera Moray/images.

I'll also put that description of screenshots somewhere official for reference. (Though if anyone has a better/more specific definition, but all means do share.)