I'm doing a really basic outline of a park scene, and i'm trying to add a circular plane so I can begin to model my amphitheater. For some reason, when I hit 'Space' and add the circle, nothing shows up. Same for appending an object. I have also tried centering it with Shift+W.
Here is the link to the .blend file. I need as much help as possible; I have a project including this I need to turn in tomorrow. Thanks for any help or insight.