1)In the Project Manager pod, right-click the style sheet where you want to edit borders or backgrounds, and click Edit.
2)Deselect Hide Inherited Styles.
3)From Available In, select a CSS file.
4)Under Other in the Styles box, select Background + Text (Body).
5)Select Format, and then select Borders And Shading.
6)Click the Border or Shading tab, define the borders or backgrounds, and click OK.
note: Any image file used for borders or backgrounds is added to the project Baggage Files folder and is included in the output you generate.