Adjust tone
Tone settings affect the tone levels (contrast and brightness) as well as the highlights and shadows of an image. If details in highlight or shadow areas are hard to see because of exposure or lighting problems, you can use Highlights and Shadows settings to make them more visible.
Adjust tone automatically
You can apply the Automatic preset to adjust tone automatically.
Adjust tone manually
You can adjust tone characteristics individually. For the Highlights & Shadows settings, you can enter a value from 0 to 100 and for all other settings, you can enter a value from -100 to 100.
Auto (Levels) - Analyzes the image and automatically sets the tone levels to achieve the best appearance. This adjustment corrects for underexposure and overexposure.
If the image is already optimized, or nearly optimized, you may not notice a difference. After you enable Auto, you can still fine-tune Highlight & Shadows settings, if desired.
Brightness - Increases or decreases the brightness of an image.
Contrast - Increases or decreases the contrast of an image.
Definition - Increases or decreases the amount of definition (detail) in an image without affecting the amount of contrast in the image.
Auto (Highlights & Shadows) - Calculates optimal highlight and shadows level and automatically applies them to the image, updating the Highlights and Shadows settings.
If the image is already optimized, or nearly optimized, you may not notice a difference. After you enable Auto, you can still fine-tune Highlights and Shadows settings, if desired.
Highlights - Enhances the details in highlighted portions of an image to make them more visible.
Shadows - Enhances the details in areas of shadow to make them more visible.