Avision AV121 (FF-0506/FF-0508/FF-0608S) - Manual (Page 36)

Invert Reverses the brightness and the colors in the
image. The default setting is Black on a White
background. Reverse mode is White on a Black
background. For color images, each pixel will be
changed into its complementary color at the
command of Invert.
Black on White
White on Black
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