Enable Chart Tool options by clicking anywhere within an Excel 2007 or 2010 chart whose information you want to modify. Click Design on the main menu, then Layout and finally, select Axis Title or ...

By embedding a chart in a Word 2013 document, you're using the same engine on which Excel relies, so shifting the axis to the graph's center mirrors Excel's procedure.

Now that the chart is created, a Chart Design tab will appear on the menu bar. If you have an existing chart, you can also use it. On the tab in the Data group, click the Switch Row / Column button.