Embedded Thumbnail Options
Tip: This option is only available for file formats that support embedded thumbnails.
Never use embedded thumbnails unless it is not possible to extract a regular image, and an embedded thumbnail exists within the image.
Always use the embedded thumbnail if it exists regardless of the requested thumbnail size. This can be useful for performance reasons on some file types however special effects such as transparency etc. may not be available.
Use the embedded thumbnail if it exists, and it is a larger size than the requested thumbnail size. The thumbnail size requested is the size of the thumbnail that Explorer is currently asking for (ie. 48x48 for Medium thumbnail view).
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