Answers for "how to make a picture full screen css"

css background full screen

body { 
  background: url(img/bg-image.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

how to many image fullscreen in css

<img src="images/bg.jpg" id="bg" alt="">