image align at center of div html code example

Example 1: centre align image in div

body {
  margin: 0;
}

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

Example 2: image center in div

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