About Scale Layers
A scale layer scales the size of any primitive layers (regions, gradients etc. i.e. object type of layers) below it.
Parameters of Scale Layers
The parameters of the scale layers are:
A positive Amount value scales up and a negative value scales down. A value of 1 scales one time, making it double it's original size. A value of 0,5 scales it up a half time. -1,0 scales an object to half its size.
The Origin is the centre of the scale.
In versions prior to 0.63.05 Scale Layer was called "Zoom layer".