1. Create a New Data Source Table and make sure you slect 'Fact (Fact Table)' under Type.
-If you do not know how to create a new data source table, click here: Extract from New Data Source
2. Under Source Settings, select the data source table you need.
3. Add Name Definitions to the 'Fact Column', and drag and drop the columns needed from the source table to populate the Source Expression column.
4. Click 'Save' and then 'Process'.