Epson Pro Mac ES-1200C - Manual (Page 16)

If your image is going to appear only on your screen and will
not be printed, click Manual in the ScanTastic screen and set
the resolution for 72, as shown below. This resolution gives
you a high-quality screen image and a small file size. If you
will be outputting a scanned image, you need to choose a
different resolution based on the image type and final output
device. See your ES-1200C Scanner User’s Guide for more
information on resolution.
Manual Enhance
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Click the Enhance box to access other scanner features. See
your ScanTastic manual for further information.
To shorten the time it takes to preview an image, press and
period when you can see all of the area you want.