What can I do with previews?

Application Wizard shows previews in the Special menu so that you can you quickly display information about files (kind, file size, creation and modification date), preview images, music, movies, PDF and text files and easily view the metadata associated with pictures, songs, movies and PDF files.

In addition to that, previews let you copy images to the Clipboard, add pictures to iPhoto, display images and PDF files as slideshows, open files with specific applications, show them in the Finder, copy them to the Desktop and move them to the Trash.

Displaying slideshows, adding pictures to iPhoto and viewing metadata requires Mac OS X 10.4 or later.