Color Adjustment

This enables color adjustment using tone curve.
Drag the Control Points (tiny squares on the line) to modify the tone curve.
The result gets displayed realtime in the canvas. Click OK when done.

Curve Choose the type of line among Bezier Curve, Spline Curve, and Straight Line.
Channel Determine which channel you want to adjust, among Red, Green, Blue, Cyan, Magenta, Yellow, Hue, Saturation, and Value.
Control Points You can put 3 through 8 handles on the line.
Intialize Reset the line.
Save You can save a curve you made for later usage.
Load You can load a saved curve.
OK This executes the change, and close the dialog.
Cancel This cancels all the changes you made, and close the dialog.