More experienced TMS users can add rates by which action?

The correct approach for more experienced Transportation Management System (TMS) users to add rates is by hovering over the financials column from the route board. This action typically allows users to access and modify financial details quickly, including adding specific rates associated with routes or shipments. The financials column is often where cost-related information is displayed, making it a logical point for users to make necessary adjustments related to pricing.

Other options, while they may involve actions related to the TMS, do not specifically pertain to adding rates in the most straightforward manner. For instance, selecting Purchase Orders from the add menu generally pertains to different functionalities, such as managing orders rather than directly inputting or modifying rate information. Similarly, hovering over the customers column would pertain to customer-related data rather than financials. Thus, interacting with the financials column specifically provides the most direct and relevant means for adding rates.