Hi. I'm fairly new to the mac world. I've been using a mac for almost 5 years...but did none of the technical side until more recently. We have a MacBook Pro connected to a projector. Everything works GREAT and it was incredibly simple to hook up. The problem we are having is when a program is not open, the screen displayed on the wall is one of outerspace. I would like it to just be a black screen. When the computer was set up, this same picture is what was on the desktop as a background. I tried changing the desktop which didn't work, and from there I don't know where to turn. I'm sure it's a simple easy fix that I just don't have the knowledge for...but that's why I turn to you guys! Thanks in advance!