If you are modifying an existing data source, the Data Source Browser will not initially appear when you click the Browse button. Instead, the Edit Source dialog box will appear. The exact contents of this dialog box depends on the data source selected. For example, if the data source is an SQL statement, the columns you can select will appear.
To change data sources, open the Edit Source dialog box, then click on the Browse Data Sources button. The Data Source Browser will appear with the current data source highlighted. You can now select a new data source.
To configure specific data sources, refer to the following sections: