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While in the Enhanced Color Mode, long press the color
mode button for 3 seconds, a red heart icon appears
with two beeps which indicates the current color mode is
added to your Favorite Enhanced Color Combination List.
Short press the color mode button to switch among “White
on Black”, “Black on White”, “Favorite front color on Favorite
back color”, “Favorite back color on Favorite front color”.
Long press the color mode for 3 seconds, the full view
icon appears with one beep which indicates that you have
changed to the Integrated Enhanced Color Combination List