Is it possible to create the new fill layer a different size (somewhat smaller, and a specific dimension) so I have the appearance of a rectangle within a rectangle, stacked layers in the document? I tried creating document 1 with size 6x4 cm, applied a white fill layer to cover it, then created document 2 with size 4 x 3 cm, applied a black fill layer to cover it, then tried to copy the black layer from document 2 on top of the white layer of document 1. For some reason, the copied black layer from the smaller document completely covered the white layer of the larger document, which is unexpected.