Why does Preview open everything
Every time I try to open something in Preview--say, I download a picture--it doesn't open JUST that one thing. It opens everything I've downloaded/opened in the past who knows how many days! It's really annoying, particularly because it makes Preview slow to operate. I've tried to look at services and preferences, I even looked at View and Edit. Nothing seems to pertain to this. It's incredibly annoying and I don't even see what purpose it could possibly serve. Is there a way to make it stop doing that, apart from always deleting everything, which seems like a step I shouldn't have to make. After all, does Pages open every document you've ever made every time you open it? Does Numbers? Does any app except this one? Drives me crazy.
Pages and iCloud-OTHER, Mac OS X (10.7.5)