As you move the cursor over an application window, the window will be highlighted. The cursor will change to a camera, which you can move around the screen. To copy a specific application window, press and hold Command-Control-Shift-4 then tap on the Spacebar.When you have the cursor over a window you want to capture, just click the mouse button and the screen shot will be saved as a PNG file on your desktop. The entire window does not need to be visible for you to capture it. The cursor will change to a camera, and you can move it around the screen. To capture a specific application window, press and hold Command-Shift-4 then tap on the Spacebar.When you release the mouse button, you can paste the screen shot to another application. A cross-hair cursor will appear and you can click and drag to select the area you wish to capture. To copy a portion of the screen to the clipboard, press Command-Control-Shift-4.When you release the mouse button, the screen shot will be automatically saved as a PNG file on your desktop following the same naming convention as explained on the first tip above. To capture a portion of the screen, press Command-Shift-4.The screen shot will be placed on your clipboard for you to paste into another program like PowerPoint, Word, Photoshop, etc. To copy the entire screen, press Command-Control-Shift-3.The screen shot will be automatically saved as a PNG file on your desktop with the filename starting with “Picture” followed by a number, example Picture 1, Picture 2, and so on. To c apture the entire screen, press Command-Shift-3.Here's a summary of all the keyboard shortcuts you can use to capture your screen in Mac OS X. A screen shot is an image of your computer desktop or an active window. The Macintosh operating system has always made it easy to capture a screen shot.

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