Using WD7 Tweaks,
How do I create a 2048 background image Centered and no repeating?
If i remember correctly, the tweak is placed over the corner of the background page

Which layer should the Tweak be placed?

Do not tile BG
Static BG


Code:
<style type="text/css">
body {background-repeat:no-repeat;
background-color:#FFFFFF;}
</style>
this code is working but makes the image forced right.

or is the new way to copy the code and place in the: Placeholder>HTML code [head]