How to Add a Background Shape to a Mac Snow Leopard Pages Document
In Pages, the Mac OS X Snow Leopard desktop publishing application, you can add shapes as a background and superimpose text over it. To add a shape (such as a rectangle or circle) as a background for your text, follow these steps:
Click the insertion cursor in the location you want.
This the location for the background shape
Click the Shapes button on the Pages toolbar and choose a shape.
The shape appears in your document.
(Optional) Click the center of the shape and drag it to a new spot.
As can image boxes, shapes can be resized or moved.
Type text over the shape.
Before you can type over a shape, remember to select it and choose Arrange→Send Object to Background.