Body background attachment

Defines whether the specified Body background image move along with the HTML content or is displayed on a fixed position in the web browser or email client.

•	Default – Any attachment setting specified in StoryTeller is used.

•	scroll – The image scrolls along with the content body.

•	fixed – The image is fixed with regard to the viewport (the viewing area on the screen).

For more information about background image attachments, see:

http://www.w3.org/TR/CSS21/colors.html