CENTERING DRAGGED LAYERS THE EASY WAY

When dragging a layer from one document to another, the object will appear in the new document at the point where your cursor was when you released the mouse button. If you'd prefer that the layer appear perfectly centered within the other document, just hold the Shift key as you drag, and when you release the mouse button, the object will be perfectly centered.

©ISTOCKPHOTO/MARK NAUGHTON