background-attachment
Syntax
background-attachment:
scroll | fixed
Default
scroll
Inherited
No
Comments
The background-attachment property determines the origin of the coordinate system for background images. The default value of scroll will position background images based on an origin at the top-left corner of the padding area of the current element, while a value of fixed places the origin at the top-left corner of the page box.
Note that the background-attachment property only changes the origin of the coordinate system used to position the image; the background image will still only be shown within the padding area of the current element.