Taking Pictures of your Screen
Using Keyboard Shortcuts
Apple has added several new ways to take pictures of items on your screen with OS X.
To take a picture of the whole screen, press Command-Shift-3.
To take a picture of part of the screen, press Command-Shift-4 then drag to select the area you want in the picture.
To take a picture of a window, menu bar, the Dock, or other area, press Command-Shift-4 then press the Space bar. Move the pointer over the area you want so that it's highlighted, then click.
The picture is saved as a Preview PDF file on the Desktop. If you want the picture saved on the Clipboard, hold down the Control (ctrl) key with the keys shown above.
If you do not want the file saved as a PDF file, then you need to hold down the Control (ctrl) key to put the picture into the clipboard. You can then paste the picture into a graphic program such as GraphicConverter to save it in another format such as JPEG or GIF.
Using the Grab Utility
Apple has also included a utility called Grab. You will be able to find the Grab application inside the utilities folder in the applications folder.
Using the Grab utility allows you to also take screen pictures such as the entire screen, a designated portion of the screen or even using a new timed feature. One difference when using the Grab utility instead of the keyboard shortcuts mentioned above is that the files are saved as TIFF files which can be opened in graphic applications without having to transfer the files via the clipboard.