According to this , you can do it yourself:
Should Supersized be Fullscreen? Nope! You can size by adjusting the #supersized styles in the CSS file. You will want to make all instances of position: fixed → position :. absolute
So change this:
#supersized {
display:block;
position:fixed;
left:0;
top:0;
overflow:hidden;
z-index:-999;
height:100%;
width:100%;
}
:
#supersized {
display:block;
position:absolute;
left:250px;
right:0;
top:0;
overflow:hidden;
z-index:-999;
height:100%;
}
Then change any other instances position:fixedto position:absoluteand you should be installed.
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