Epson Stylus Pro 4400 Reference Manual page 198

Mode
EPSON Vivid
Charts and
Graphs
EPSON
Standard
(sRGB)
Adobe RGB
Gamma
Controls image contrast by modifying the midtones and
mid-level grays.
Advanced Settings
The color enhancement sliders adjust the indicated options in a
range of -25% to +25%.
Drag the slider to the right or left with your mouse to adjust the
settings. You can also type a value from -25% to +25% in the boxes
next to the sliders.
198
Printing with Mac OS X
Select this setting to enrich the blue and green tones in
printouts.
Note:
Because this setting reproduces blue and green tones
that cannot be displayed by your monitor, your printouts
may differ from the screen images when this function is
selected.
Intensifies the colors and lightens the midtones and
highlights of an image. Use this setting for presentation
graphics, such as charts and graphs.
For EPSON Stylus Pro 4800 only:
Increases the contrast in images. Use this setting for color
photographs.
For EPSON Stylus Pro 4800 only:
Matches image color to Adobe RGB.