Remember as a kid you played with a mirror, putting your face to the side of it and your friends were laughing at the funny symmetry of your face and your faces reflection?
Image overlay pattern comes in very handy when a website has a full screen image or a video as a background. Applying a pattern can make things more readable and easier on eyes. Let's Photoshop.
Basic tutorial for everyone who want to will learn how to use a dedicated tool for really quick changing of any color you want on a photograph with the help of trusty Photoshop.