Modifying Driver Selections To modify driver selections: In an open model, from Task Areas, select Manage Allocations, then Driver Selections. Select a POV, and then click Go . Select a Layer. On Driver Rules, under Stage, select the model stage. The driver dimension for the selected stage is displayed in the first column, and all members within that driver dimension are listed below. Under Driver, click the cell that contains the driver to be modified to display the Common Member Selector, or click Add to select another driver. From the Common Member Selector, select another driver, and then click OK. The driver selection is automatically saved.