Some file formats support embedded metadata, the kind of textual
information you can alter using the Adobe Photoshop 'File Info...'
command.
If this hint property is set to true the file or data that you
supply to the graphic object will be scanned for Exif metadata.
This means you can extract camera information, such as the camera
make and model, any gps information, thumbnail and other
information from images (see http://www.exif.org)
The Exif information can be obtained using the Exif
property which contains objects designed to present the exif
information in a number of different ways.
Setting the value of this property to false can result in faster
operations.
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