Nikon LS8000 - Manual (Page 84)

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When using Nikon Scan as a stand-alone application, you can use the Ctrl-T (Windows) or -T (Macintosh)
keyboard shortcut to switch between the Processed and Natural tabs.
The Processed/Natural Tabs
To view the effects of any changes that have been made and compare them with the
original, use the Processed and Natural tabs in the preview area to switch back and forth
between the processed and original image. The image produced when you click the Scan
button to open the image in the host application will be the same as the image in the
Processed tab.