Suppose initially the Y-axis shows Seller and the X-axis shows All Time, a 5-year history time horizon. (See FIG. 12.) Using a mouse or other selection mechanism, the user would select Seller to break the axis into North America, South America, Europe, and Asia. (See FIG. 13.) The user would select Time to break it into 5 previous years. (See FIG. 14.) On this selection, the grid changes from disp