A key for the the amount of boost to apply to an image. The associated value is a floating-point value packaged as an NSNumber object. The value must be in the range of 0...1. A value of 0 indicates no boost, that is, a linear response. The default value is 1, which indicates full boost.
Available in Mac OS X v10.5 and later.
Declaration Syntax Version Information- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)