align text in div horizontally center code example

Example 1: how to make a division center css

position:absolute;
top:50%;
left:50%;
transform:translate(-50%,-50%);

Example 2: how to assign something in center inside a div

IMG.displayed {
    display: block;
    margin-left: auto;
    margin-right: auto }
...
<IMG class="displayed" src="..." alt="...">