Don’t uncheck an item or you’ll remove it from the chart.
(I also found that using this dialog box sometimes froze PowerPoint, so save your work first.) You can only change the values on the left side of the dialog box, so you might have to click the Switch Row/Column button.Choose Select Data in the Data section.With the chart selected, click the Chart Tools Design tab.You can manage the order of items one by one if you don’t want to reverse the entire set. If you’re reversing the values, the check box reads “Values in Reverse Order.” 2. If you want to change the order that the items appear on the horizontal axis, click that axis. In the Axis Options section (click the Axis Options icon if necessary–it looks like a graph), check the Categories in Reverse Order check box.On the Format tab in the Current Selection group, click Format Selection or simply right-click and choose Format Axis.In this example, you want to change the order that the items on the vertical axis appear, so click the vertical axis.
