How do I turn a screenshot into a JPG?

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Tags

1. #displayed
2. #favorite
3. #photoshop
4. #create
5. #editor
6. #image
7. #print
8. #paste
9. #press
10. #screenshot
11. #capture
12. #paintshop
13. #gimpshop
14. #paint
15. #screen
16. #others
17. #irfanview