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How to Capture the Screen or Window as an Image
Built into Mac OS X are handy shortcuts for capturing the screen.
The control-cmd-shift-4 is extremely useful to capture a desired area; a cursor appears, click and drag to select the desired area, which is then placed on the clipboard as an image.
As shown below, the ^ character indicates the “control” key, the up-arrow means the shift key, and the curly thing is the “command” key.
Setting the type of image format to be captured
The default format is PNG.
To change, open a Terminal window and paste in the line of choice.
TIF is very large, but best quality. Set the format to TIFF:
defaults write com.apple.screencapture type tiff
Set the format to PNG:
defaults write com.apple.screencapture type png
Set the format to GIF:
defaults write com.apple.screencapture type gif
Set the format to PDF:
defaults write com.apple.screencapture type pdf
For the setting to take effect, logout and log back in, or enter:
To neatly capture just one window, Grab is found in.