Answers for "css center images in div"

css center element on screen

.centered {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

centre align image in div

body {
  margin: 0;
}

#over img {
  margin-left: auto;
  margin-right: auto;
  display: block;
}

image center in div

img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 40%;
}