Humanware Prodigi DUO User Manual page 27

Color contrast is useful if you want to view documents, objects,
and photographs in their original color.
Positive contrast shows text and images in 2 colors according to
the color scheme of your choice, the default combination being
Black on White. This is a practical way to view text in the best
color combination for your vision.
Negative contrast shows text and images in reversed contrast as
compared to your color scheme. For example, if your color
scheme is Black on White, negative contrast will show text and
images in White on Black. This is useful if you wish to reverse the
contrast of a text that contains different contrasts.
Diamond Edge™ contrast combines the best of both worlds; it
shows Diamond Edge Text™ in your selected color scheme and
images in their original color. This allows you to magnify text
indefinitely without compromising its quality in the best color
combination for your vision, while viewing images in their original
color on the same page.
To toggle between the different contrasts, swipe on the right edge
of the touchpad or the touchscreen:
To change your contrast, you can also press and hold the Back
button to access the Quick Settings, select Contrast and tap to
choose a contrast. In the Quick Settings, you can also change
your color scheme by selecting Colors and tapping to choose a
color scheme. Press Back to exit the Quick Settings.
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