If you have an existing Photoshop layer with an image in it, you can add a new image to it by clicking on the Add Image button at the bottom of the Layer palette. You can choose from a variety of sources, including online images, photos from your camera, or images you’ve taken yourself. Once you’ve chosen an image to add, click on the Add Image button and then select a size for the new image. You can also choose to have the new image fill all of the space in the layer or just a small part of it. Once you’ve selected a size and clicked on OK, Photoshop will add the new image to your layer.
