I did the direct jump from Snow Leopard to Mavericks and there is possibility that I have missed some changes in the versions in between. Nonetheless, here is my problem:
When I open a document (e.g. an image) preview shows up and does its job. The problem is when I press the close button in the finder, the Preview is closed completely. In 10.6 Preview would remain open, indicated by little white dot bellow its icon in the dock. How can I keep Preview open and let it close only if I send a cmd+q?