The tables or files associated with a Connection can be displayed in the Browser pane on the right side of the Builder window by:

1. Selecting the Browse > Data Warehouse menu option to browse for the data warehouse connection,
2. Selecting the Browse > Source Tables menu option to browse a source system connection,
3. Right-clicking a Connection in the Objects list pane and selecting Browse Connection from the context menu, or
4. Clicking one of the two browser buttons from the toolbar:

The red button is used to browse the data warehouse connection and the blue button is used to browse a source system connection.
Each button remembers the last connection it browsed, so in this way, one button can be used for the Data Warehouse and one for a source system. 
Clicking one of the buttons displays the source tables without first displaying the source browser window. To change the connection, click the down arrow next to one of the browser buttons and then select Change Connection.

The current connection being browsed is shown in the status bar at the bottom right of the screen.