You can rotate, or "angle," text in a chart title or along an axis. You cannot rotate legend text.
If you clicked an axis title, click Selected Axis Title on the Format menu.
If you clicked a chart title, click Selected Chart Title on the Format menu.
If you don't see the Alignment tab, click Cancel, click outside of the text you want to format, and then repeat steps 1-3.
Tip To quickly rotate selected text 45 degrees up or down, click Angle Text Upward
or Angle Text Downward
.