To duplicate a layer from one image to another is pretty basic. The real trick here is to move the layer from one image to another image of the same size (like in a web photo gallery) and to have the duplicated layer be in the same position as the original (source) image. It’s a great tip for anyone wanting to add a watermark to a bunch of photos with the watermark being positioned in the same place in each separate photo. *Note – The images need to be the same size for this to work.
Most of you know that you can just drag a layer from the layers palette of one image into another image, and if you didn’t, now you do. To get the layer to “land” in the same spot within the new image, just hold the Shift Key (Shift + Drag) while you drag the layer into the new image. Presto Duplicato.