Margins and regions, Example 1 <fo:region-before extent= 0.5cm background color= green /> <fo:region-after extent= 0.5cm background-color= yellow /> <fo:region-start extent= 0.5cm background-color= blue /> <fo:region-end extent= 0.5cm background-color= red /> The simple-page-master margin surrounds the page-reference-area, which is divided into five regions In this example we have a zero margin in the simple-page-master –so, here, the page-reference-area covers the entire page