You can access the Rate Lookup sub-module by clicking Plan Setup > Rate Lookup from the LHS menu. Upon clicking this link, the Rate Lookup page is displayed as depicted in the following figure:
The Rate Lookup page displays the existing list with details such as Rate Lookup ID, Rate Lookup Name, Rate Lookup Type, Subselection Key, and Subselection Value.
You can click the 
button to view the additional fields such as Row_Key, Created Date, and Modified Date.