User blog comment:William Seasteel/New Boss!!!!/@comment-7241342-20120623042108/@comment-1279322-20120623042553

Shift, command, 3 for a full-screen screenshot.

Shift, command, 4 for a cropped image.

You can always get a screenshot of the whole screen and then crop it with Shift, command, 4 to make it easier in case the boss moves out of view.