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It's used to activate a search or put the computer to 'sleep'.

Pressing F3 on its own drops down a small window where you can type a word (or words) to search for. Once you enter the search string - successive presses of the F3 key will jump to the next occurrence.

Pressing the Fn key + F3 together puts the computer into sleep mode.

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11y ago
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12y ago

Key F3 combined with the Function (Fn) key - puts the computer into 'sleep' mode.

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Wiki User

13y ago

Helps us to play games

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Q: What does the F3 key do in the command window?
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