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User Curve R – Enables the use of red curve.

Use Curve G – Enables the use of green curve.

Use Curve B – Enables the use of blue curve.
The curves can be manipulated by adding (Image Added) and/or removing (Image Added) points from the curve.

Num Bezier Points for R/G/B Curve – Specifies the number of precisely calculated points from Bezier curves.

Extrapolate Beyond End Points for R/G/B Curve – When enabled, extrapolates beyond the control points.

Extrapolate Type for R/G/B Curve – Specifies the type of extrapolation for points out of the control range.

End Tangent – The curve is not extrapolated beyond the end tangent.
Linear – The curve continues to increase/decrease in a linear fashion beyond the control points, depending on its behavior beforehand. For instance, if the curve was going up at its end, then it will continue to go up and vice versa. This extrapolation type is useful for linear graphs.
Constant – The curve continues beyond the control points at the same level as the last point of the curve. For instance, if the last point is set at the top of the graph, then any point after that will also be at the top.

Image Removed Image Added