Request items, which represent dates or names, are usually assigned to one of the label panes. Labels are the scalar axis definitions that reference the information in your chart. Depending on whether you create a two-dimensional or three-dimensional chart, you assign other data to one or two labels panes.
For example, assume you create a pie chart to see the proportional sales totals for all your regional sales managers. After adding the sales dollars to the values pane to create the pie chart, assume you divide it in slices by placing the employee name in the x pane. In this example, the employees are the axis labels.
The panes at the top right is the z pane, and the pane at the bottom right is the x pane. Depending on the type of chart you create, you can use one or both of these panes, or the panes could switch around with the data values panes.