Hi,
Apple shift 3 did it. Very cool, sounded like a camera taking a picture. Apple Shift 4 and you can do just a portion of the screen.
Here's finders info.
Take a picture of the whole screen
Press Apple Shift-3
Take a picture of part of the screen
Press Apple Shift-4, then drag to select the area you want in the picture.
To cancel, press Escape.
Take a picture of a window, a menu, the menu bar, or the Dock.
Press Apple -Shift-4, then press the Space bar. Move the pointer over the area you want so that it's highlighted, then click.
To drag to select the area instead, press the Space bar again. To cancel, press Escape.
Lori