How to Rotate to Landscape in Excel Charts

1. Click on the vertical axis.
2. Click on the 'Format' tab under Chart Tools.
3. Click 'Format Selection.' Make sure that the vertical axis is displayed in the selection box. If it isn't, click on the axis.
4. Click on the 'Categories in reverse order' box. This reverses the order of categories and places the vertical values in the horizontal axis and vice versa.