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# Scale Value Functions

Scale value transform functions construct a 4x4 matrix that represents the corresponding scale matrix.

## Topics

### Constants

[`scale`](/documentation/QuartzCore/CAValueFunctionName/scale)

A value function scales by the input value along all three axis. Animations using this value transform function must provide animation values in an `NSArray` of three `NSNumber` instances that specify the (x, y, z) scale values.

[`scaleX`](/documentation/QuartzCore/CAValueFunctionName/scaleX)

A value function scales by the input value along the x-axis. Animations referencing this value transform function must provide a single animation value.

[`scaleY`](/documentation/QuartzCore/CAValueFunctionName/scaleY)

A value function scales by the input value along the y-axis. Animations referencing this value function must provide a single animation value.

[`scaleZ`](/documentation/QuartzCore/CAValueFunctionName/scaleZ)

A value function that scales by the input value along the z-axis. Animations referencing this value function must provide a single animation value.


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