How do you unlock the menu on a Dell monitor?

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Tags

1. #happens
2. #e228wfp
3. #settings
4. #research
5. #cables
6. #screen
7. #p2210
8. #holding
9. #after
10. #unlocked
11. #connect
12. #became
13. #u2412
14. #1701fp
15. #seconds
16. #apparently
17. #placed
18. #locked
19. #monitors
20. #button