One of the big things I do here in OS X tips is take screenshots. A quick Command-Shift-3 will get me a picture of my entire screen, while a Command-Shift-4 will get me a crosshair which I can use to click and drag around any area of my screen to get a more specific area of my Mac’s screen to demonstrate a point.
Sometimes, though, I miss. When I don’t get the right area of the screen, I typically hit the Escape key and then Command-Shift-4 to try again. If however, I need to just move the selection area around to another part of the screen, I always assumed I was out of luck.
Not true, and it’s super easy to do.