How do you rotate a background in PowerPoint?

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Tags

1. #tools
2. #click
3. #format
4. #manner
5. #double
6. #desired
7. #options
8. #select
9. #arrange
10. #horizontal
11. #launch
12. #vertical
13. #within
14. #image
15. #picture
16. #rotate
17. #powerpoint
18. #versions
19. #group