This is purely for convenience.
For the margin property we can condense margin-left:0px; margin-right:0px; margin-top:0px; margin-bottom:0px; as margin:0px 0px 0px 0px; and further as margin:0px;
Can we do the same for top: 0; left: 0; bottom: 0; right: 0;? e.g., placement:0;?
