Screenshots

Shortcuts
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 * Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop
 * Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop
 * Command-Shift-4, then space, then click a window: Take a screenshot of a window and save it as a file on the desktop
 * Command-Control-Shift-3: Take a screenshot of the screen, and save it to the clipboard
 * Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard
 * Command-Control-Shift-4, then space, then click a window: Take a screenshot of a window and save it to the clipboard

Formats
Different versions of Mac OS X have different formats for screenshots. In Mac OS X 10.4, the default screenshot format can be changed, by opening Terminal (located at /Applications/Utilities/Terminal) and typing in: code defaults write com.apple.screencapture type //image_format// killall SystemUIServer
 * Mac OS X 10.2 (Jaguar): jpg
 * Mac OS X 10.3 (Panther): pdf
 * Mac OS X 10.4 (Tiger): png

code Where //image_format// is one of jpg, tiff, pdf, png, bmp or pict (among others). If you omit the second line, you will need to log out and in again for the change to take effect. []

Grab and Preview
Instead of using the keyboard shortcuts above, screenshots can be taken by using the Grab application included with Mac OS X. It is located at /Applications/Utilities/Grab. In Mac OS X 10.4, the Preview application can also be used to take screenshots, by using the Grab submenu in the File menu. []

From the Terminal
The screencapture command in the Terminal can also be used to capture screenshots, and is useful for scripts. Here is an example. code screencapture -iW ~/Desktop/screen.jpg

code []