How to Change the Default Save Location for OS X Screenshots
These are instructions on how to change the default save location of OS X screenshots to a folder of your choice. By default Apple has screenshots save to your desktop.
Launch Terminal from the Applications:Utilities folder.
Input defaults write com.apple.screencapture location ~/Scratch into the Terminal window changing '~/Scratch' to a folder of your choice and then press Return.
Input killall SystemUIServer into the Terminal window and press Return to make the changes immediate.
To undo these changes simply follow them again using this command to change the save location: defaults write com.apple.screencapture location ~/Desktop