Manual Mode - Epson PERFECTION 1640 SU Reference Manual

Manual mode

In the Manual mode, there are many more options available to
give you greater control over your scanning. If you want to
sharpen, correct, enhance or preview your images before
scanning them, select the Manual mode. If you do not need all the
options that the Manual mode provides, click the Full Auto Mode
button to open the Full Auto mode window.
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Scanning Basics