If you have not already done so, insert a Histogram chart by selecting it from the Insert menu, or double-click an existing chart to access the configuration panel.
Select the Chart tab.
In the Tool Tip Options section, select the Enable check box to enable Tool Tips.
To show categories and/or frequencies in Tool Tips, select the Category and/or Frequency check boxes.
To show a Tool Tip background in the same color as is set for the column (specified on the Data tab), select the Use Series Color check box.
In the Decimal Places box, enter the number of decimal places for values in the Tool Tips.
