When you maximize a window to which button does the maximize button change?

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Tags

1. #right
2. #corner
3. #button
4. #change
5. #square
6. #window
7. #maximize
8. #restore
9. #expand
10. #upper
11. #windows
12. #expanded
13. #double
14. #click
15. #title
16. #close
17. #should
18. #maximized
19. #screen