In the process of developing web applications an important step is to handle the way the pages look. This is handled by different type of web resources: css, js, images, swf. The management of those web resources is done by using a web application called *Resource Library*. 

Starting Resource Library

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The layout of the web pages follows the *Template* pattern. This way the layout and the design of the web page can be changed very easy. A template is a zk page that defines placeholders for different regions of the web page, regions that are defined in the framework as *zones*. In the figure below you can see a 4-region page: the header, the upper-left menu, the lower left menu and the center.

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