How?
In the Vertical position and Horizontal position lists, select an option to specify how you want to position the graphic within the paragraph.
In the Repeat list, click an option to specify how you want to tile the graphic under the selected text. For example, to tile the graphic horizontally, click Repeat-x.
In the Attachment list, click an option to specify whether the background graphic should be fixed relative to the browser window, or whether it should scroll with the document.