The align layers function is ok but does not work well when doing thing like aligning photos with different exposures and different foreground elements that confuse the software. Dear Photoshop, Please consider re-writing "ALIGN LAYERS" based on user set control points or reference points. For those of us doing compositing work this would be really helpful. If there is only a small portion of a photo i want to merge with another it would be very helpful for me to use control points to set just that area of the photo that needs to be exactly aligned with another layer. thanks.