Display Bar Chart Labels Horizontally or Diagonally

1. From the bar chart Axes panel, select Category from the Axis list.
2. Select the Scales and Tics tab.
3. Under Category Labels, select Horizontal to display the labels horizontally.

Or

4. Select Diagonal to display the labels diagonally.
5. Click the font button, , from the Scales and Tics tab to change font attributes for axis labels.