Epson Perfection V500 - Manual (Page 67)

You will scan the images at their original size, but then enlarge them later in
an image-editing program.
If you plan to enlarge your images later in an image-editing program, you need to
increase the Resolution setting to retain a high image quality after enlargement.
Increase the resolution by the same amount you will increase the image size. For
example, if the resolution is 300 dpi (dots per inch), but you will increase the image size
to 200% in an image-editing program, change the Resolution setting to 600 dpi in
Epson Scan.
Click the arrow next to the Resolution list and select the number of dots per inch at which you
want to scan. See the table below for some guidelines.
What you will do with
the scanned image
Suggested scan resolution
Send via e-mail, upload to
web, view only on the
screen
96 to 150 dpi
Print, convert to editable
text (OCR)
300 dpi
Fax 200 dpi
Enlarge after scanning at
100%
Increase Resolution setting by same amount you will
increase image size after scanning
After selecting the Resolution, you can preview your image and make any necessary
adjustments. See
Previewing and Adjusting the Scan Area to continue scanning.
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Previewing and Adjusting the Scan Area
Once you have selected your basic settings and resolution in Home or Professional Mode, you
can preview your image and select or adjust the area of the image(s) you want to scan. Epson
Scan displays the preview image(s) in a separate Preview window on your screen.
There are two types of preview.
Normal preview displays your previewed images in their entirety. You must select the
scan area and make any image quality adjustments manually. This is the default
preview type in Professional Mode, but you can also select it in Home Mode, if available.
Thumbnail preview displays your previewed images as thumbnails. Epson Scan
automatically locates the edges of your scan area and applies automatic exposure
settings to the images. This is the default preview type in Home Mode, but you can also
select it in Professional Mode, if available.
Note: