Canon PIXMA MP280 On-Screen Manual - Page 521

Adjusting Tone Curve Page 521 of 707 pages Adjusting Tone Curve In Select Tone Curve, select a tone curve from No correction, Overexposure, Underexposure, High contrast, Reverse the negative/positive image and Edit custom curve. No correction (No adjustment) Overexposure (Convex curve) The midtone data of the input side is stretched toward the highlight of the output side, resulting in a bright-toned image when viewed on a monitor. Underexposure (Concave curve) The midtone data of the input side is stretched toward the shadow of the output side, resulting in a darktoned image when viewed on a monitor. High contrast (S curve) The highlight and shadow of the input side are enhanced, resulting in a high-contrast image. Reverse the negative/positive image (Downward-sloping line) The input and output sides are reversed, resulting in a negative-positive inverted image.