The Tone Curve Adjustment is adjustment for output density curve of each color of CMYK.
This function of Color Centro enables to adjust the brightness and the contrast for the entire image.
Operation of adjustment can be done with dragging the slider or the point of curve. You can operate viewing the preview of the adjustment result.
The tone curve can be registered/saved to both the image controller and computer. The tone curve registered to the image controller can be adopted to the output. You can set the tone curve to use as default from among registered tone curves when you use "Color Default Settings" function or "Color Configuration Management" function. You can also specify the tone curve to use from the printer driver for each job.
For details, refer to Tone Curve Adjustment Screen and Tone Curve Adjustment Flow.