About Scale Layers
A Scale Layer scales the size of any primitive layers (regions, gradients, etc.) below it.
Parameters of Scale Layers
The parameters of the Scale Layers are:
For Amount, a positive value will scale up and a negative value will scale down. A value of 1.0 will double the original size of the object. A value of 0.5 will increase the object by 50%. While a value of -1.0 will reduce an object to half its original size.
The Origin is the centre of the scale.
In versions prior to 0.63.05 Scale Layer was called "Zoom layer".