- internet connection hotkey
- e-mail hotkey
- Volume toggle up/down
- screen contrast toggle
- Activate video out to projector
- etc.
Actually laptops take advantages on this function because it doesn't have as much room as PC, Using this keys will increase your speed to work with computer/laptop.


It depends to the computer/laptop manufacturer, Fn key used to be in the left corner keyboard layout and the function keys are F1 to F12 or numeric keys marked(generally blue) with appropriate symbols.
How to use it?
Just press the Fn key simultaneously with the hotkey for the function you need.

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