Change Default Screenshot Name and Type in OS X Mavericks
How to Change Default Screenshot Name and Type (jpg,png,..) in OS X Mavericks.
Commands:
To Change Screenshot FileName Prefix.
Type: defaults write com.apple.screencapture name "QTD";killall SystemUIServer
To Change Screenshot Format (jpg, tiff, pdf, png, bmp)
Type: defaults write com.apple.screencapture type jpg;killall SystemUIServer
Type: defaults write com.apple.screencapture type tiff;killall SystemUIServer