Media Preview Configuration 

Simplify data search within your system. Check out the assistant with an advanced set of parameters for data filtering and browsing specification. Visualize the data with custom thumbnails according to your preferences. Save profiles for quick repeated searches.

Media Preview doesn't simply search for random pictures within your media files, but uses a complete set of image metrics as guidelines to ensure that generated thumbnails are representative enough. Obviously, despite everything has been done in order to fetch the ideal thumbnail, some limitations have been introduced to avoid unwelcomed computer overload.