Epson CX6500 Reference Manual page 321

For Windows users, the following characters cannot be used in the prefix.
\, /, :, ., *, ?, ", <, >, |
For Macintosh users, you cannot use colon (:) in the prefix.
The number must be 3 digits. To save images using the MS -DOS 8.3 format, make
sure the prefix does not exceed 5 alphanumeric characters.
Select a file format from the following table. Depending on the selected file format, the Options
button may be available so that you can make detailed settings for scanned images.
Format
(File Extension)
BITMAP (*.BMP)
(Windows only)
JPEG (*.JPG)
Multi-TIFF (*.TIF)
PDF (*.PDF)
Explanation
A standard image file format for Windows. Most Windows
applications including word processing applications can read
images in this format.
A compressed file format. The compression quality can be
selected. The JEPG format enables relatively high compression
ratio. However, the higher the compression ratio is, the lower
the image quality becomes. (Note that the original data cannot
be restored.) In addition, the quality deteriorates every time the
data is saved. The TIFF format is recommended in cases where
modification, retouch and like are required.
A TIFF format where multiple pages are saved to the same file.
To open the Multi-TIFF files, you need an application
supporting this format.
A document format that is independent of platforms. To use
PDF documents, you need Adobe Acrobat
Acrobat. When you save color or grayscale images in PDF, you
can select a compression quality.
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