Epson Stylus Photo 870 Daily Use page 26

Using the PhotoEnhance mode
The PhotoEnhance mode provides a variety of image-correction
settings that you can apply to your photo images before printing.
PhotoEnhance does not affect your original data.
Note:
This mode is only available only when printing 32-bit color data.
Printing with PhotoEnhance selected may increase the time
required for printing, depending on your computer system and the
amount of data contained in your image.
Do not print using PhotoEnhance mode if Roll Paper is selected
as the Paper Source on the Paper menu.
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