The Auto-Blend Layers command, which was designed to be used after the Auto-Align Layers command (Auto-Aligning Layers and Photomerge), helps you blend images for a panorama or collage, or combine multiple exposures of the same image to create an extended depth of field (see Auto-Blending Layers) so more of an object looks like it's in focus. When you use this command, Photoshop creates complex layer masks to blend your images, saving you a lot of hard work.