Let’s say that you’ve added a layer style, or even several layer styles to a layer in Photoshop. Now you find that you need the same look on another layer, so is there a quick way to do this or do you have to go through the layers dialog box all over again? Well, yes of course there is a shortcut!
All that’s required here is to click on the layer style you want to copy to another layer and hold down the Alt (PC) or Option (Mac) key and drag the effect onto your layer of choice. By holding down the Alt/Option key you simply duplicate the layer effect whilst dragging the effect to another layer.