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Use the sliders to control exposure compensation, contrast, shadow, highlight, and saturation. To view the
sliders, display the Adjustment Controls Palette on your screen, and maximize the panel titled Tonal
Adjustments.
In Auto Mode, all tonal adjustment sliders, with the exception of Sharpness, may apply when you select
Auto Mode. In the case of X3 Fill Light, only a very small amount of adjustment is built into the Auto
adjustment. Like Sharpness, the amount of X3 Fill Light is dependent on the content of the image and the
preference of the photographer.
To increase sharpness, or increase the dodging and burning effect from X3 Fill Light, further adjust these
sliders after selecting Auto Mode.
Exposure
The Exposure Compensation slider affects the overall
brightness of an image as if the original exposure had
been changed. Use this control for slightly under or
overexposed images. Each 1/10 increment of the slider
represents 1/10 of an f/stop. The range of the Exposure
slider is two stops in each direction.
Contrast
The Contrast slider affects the blackness of the blacks
and the whiteness of the whites with a single control.
Increasing the constrast brightens the whites and darkens
the blacks. Decreasing the contrast grays both the whites
and the blacks. The range of the Contrast slider is –2.0 to
2.0.
Shadow
The Shadow slider affects the blackness of the shadows.
Increasing the number makes shadows lighter, decreasing
the number makes shadows darker. The range of the
Shadow slider is –2.0 to 2.0.
Highlight
The Highlight slider affects the brightness of the highlights. Increasing the number makes highlights
brighter, decreasing the number makes highlights darker. The range of the Highlight slider is –2.0 to 2.0.
Saturation
The Saturation slider affects the intensity of the color in your image. Increasing the saturation makes the
color richer, decreasing the saturation makes the color weaker. The range of the Saturation slider is –2.0 to
2.0. The minimum saturation value of –2.0 corresponds to a pure grayscale (Black and White) image.
Sharpness
The Sharpness slider affects the clarity of detail in your image. The higher the number, the stronger the
sharpness. The range of the Sharpness slider is –2.0 to 2.0.
X3 Fill Light
The Fill Light slider affects tone correction by adding extra light energy into the shadow regions without
overexposing highlight regions. The range of the X3 Fill Light slider is –2.0 to 2.0.
SIGMA Photo Pro User Guide
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