Bioinfo concepts

You can set your width using relative percentage, such as 50%, the actual width will be 50% of the parent width. To center the absolute header, you can set its left and right to 0 and margin:0 auto: #header{   position: absolute;   top: 10%;     left:0;   right:0;   margin:0 auto;   width: 50%;   height: 100px;   border:thin solid black;   text-overflow:ellipsis;   overflow:hidden; }

1) open cnt+alt+t   2) $ instmodsh

display: inline-block; margin-top: value;