Apple Final Cut Pro 5 - Manual (Page 1274)

Chapter 20 Color Correcting Clips 487
II
Luminance Limiting controls
 Enable: Click here to enable or disable the Luminance Limiting controls. Deselecting
this checkbox doesn’t prevent any of the luminance controls from being moved; it
just disables their effects.
 Clamp Above: Adjust the slider or enter a value to define the maximum allowable
percentage of luminance, above which values will be clamped. This defaults to 109.
 Max Output: All values in between Start (Threshold) and Clamp Above will be
compressed so that no values are clipped.
 Start (Threshold): Adjust the slider or enter a value where the luma of your clip will
begin to be compressed, up to the value defined by Clamp Above.
Saturation Limiting controls
 Enable: Click here to enable or disable the Saturation Limiting controls. Deselecting
this checkbox does not prevent any of the saturation controls from being moved; it
simply disables their effects.
 Clamp Above: Adjust the slider or enter a value to define the maximum allowable
percentage of saturation, above which values will be clamped. This defaults to 133,
which should be acceptable for most broadcasters.
 Max Output: All values in between Start (Threshold) and Clamp Above will be
compressed so that no values are clipped.
 Start (Threshold): Adjust the slider or enter a value where the saturation of your clip
will begin to be compressed, up to the value defined by Clamp Above.
 Reduce Chroma/Luma: Adjust the slider or enter a value to define the amount by
which the chroma will be reduced, when necessary.