Thanks to follower Paradise Purls,
LOOK! A screen shot:
"Ok, I have a mac, too, and this is how I get my screen shots. First, hit command, shift, F for a full screen. Then position the treasury pic on the screen so you see the whole thing. Then, hit command, shift, 4 which brings up the crosshairs. Click and drag to highlight the treasury. Let go and voila, screen shot perfection!"
Works like a charm. I am so excited. Even the guys at the Apple store couldn't tell me how to do this.