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Understanding Z scale


    Usually, scaling a layer's Z axis has no effect on the layer because the layer itself has no depth. However, changing the position of the layer anchor point or establishing a parenting relationship with other layers adds depth to a layer either relative to its anchor point, or to child layers. In these cases, scaling a layer's Z axis will appear to affect the layer.

    If the Z-axis value of a layer's anchor point has been adjusted so that the anchor point rests somewhere behind or in front of the layer (has a value greater or less than 0) or if the scaled layer is a parent to other 3D layers, then changing the Z axis of that layer expands or contracts the area between either the layer and the anchor point, or the parent and child layers. This contraction or expansion of the area between the anchor point or child layer and the scaled layer makes the scaled layer or layers appear to change position.