A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Why do you need to rotate the chart? It sounds to me like you simply want to have the Horizontal Axis Title at the top rather than at the bottom. There is no menu option to position it there but you can drag it to wherever you please. To make room for it, the Plot Area can be dragged & resized as well.
If I've misunderstood, please be more descriptive of the issue, including some idea of what the data is, what type of chart, as well as any additional details that will paint a more vivid picture of what you want to accomplish.
Regards,
Bob J.