The shortcut to grab a selection of the screen (Cmd+Shift+4) always "grabs" the picture as a PDF on my desktop. Whenever I use this on any other Mac besides mine it saves them as JPG's. With mine, I take a picture, open the PDF in Preview, and then have to export it as a JPG. It gets really tiresome. I know I could use the Grab Utility, but this way is much easier and faster and if I could continue to use it I would love to. Does anyone know how to change the settings for this to make it save JPG's instead of PDF's?