The Data Analyzer user interface supports customization, including specifying the font attributes, such as font, color, and size, that appear in dialog boxes and in the cross tab. To customize the Data Analyzer user interface, a developer modifies a cascading style sheet (.css) file, which specifies the attributes and properties that apply to Data Analyzer. Then, a system administrator copies the CSS file to the BIRT iServer file system, making the modifications available for display in Data Analyzer.