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.
Once you’ve hit Command-Shift-4, and then selected your area for a screenshot, you might notice that you want to move the selection area around. Once you drag your cursor out to the area you want to capture, hold the Space bar down while continuing to hold the click down on your mouse or trackpad. You can then move your mouse cursor around and the selected area will move with it. If you don’t let go of the mouse button, you can even continue to resize the selection area if you release the Space bar. Pretty slick, if you ask me.
Once you’ve moved everything around to the right area, let go of the mouse button, and you’ll hear the telltale camera shutter click sound that lets you know you’ve taken a screenshot. Unless, of course, your sound is off.
Via: Addictive Tips