Hi,
you edit the initial view when you right click the datasource and hit "edit initial view", there you can add some columns. With a HANA datasource your initial view will only display key figures at first.
If you want to modify that at runtime, take a look at a method like "moveDimensionBefore":
http://help.sap.com/businessobject/product_guides/AAD11/en/ds11SP01_user_en.pdf#page=185
Best regards,
Victor