Epson Perfection 640U Reference Manual page 20

1. Press the s Scan button on the scanner. The following
window appears.
EPSON TWAIN automatically previews the images and
recognizes the image type.
Note:
To cancel the operation, click Cancel and then click Close.
2. The following window appears with a progress bar to indicate
the scanning progress. You can see the type of document
being scanned. When scanning multiple photos, you scan also
see the number of scanned image.
1-12
Using the Buttons