The Data Flow Overview diagram feature shows a complete analysis of the lineage defined in the source model. It helps you to understand the flow of data through your information system.
Open a model, in this example Dimensional DW.
In the Metadata Browser toolbar, click the
Data Flow Overview icon.
Click the Expand this node button to show this node to
the column level.
You can also click an element and select To Column level in the Expand the selected node to the desired level sub-menu.