What is the use of all "F" keys in the laptop ?

The function keys (also known as "F keys" or "F-keys") on a laptop are a set of keys that are typically located at the top of the keyboard, and have a specific function assigned to each one. The specific functions of these keys can vary depending on the laptop and the software you're using, but some common uses include:
 

• F1 - F12: These keys are often used as shortcut keys for specific functions within software programs. For example, in Microsoft Word, F1 opens the help menu, while F12 opens the save as dialog box.

 

• Volume control: Some laptops use the F1-F12 keys for controlling the volume, for example, F1 decreases the volume and F2 increases it.

 

• Brightness Control: Some laptops use F1-F12 keys for controlling the screen brightness, for example, F3 decrease the brightness, F4 increase it.

 

• Media controls: Some laptops use F1-F12 keys for controlling media playback, such as playing, pausing, or skipping tracks in a media player.

 

• Special keys: Some laptops include special keys such as the F5 key, which is often used to refresh a web page or to reload a new page.

 

• Function Lock (Fn Lock): Some laptops include a function key (Fn) that can be used to lock the function keys, so that you can use them as regular function keys rather than special shortcut keys.

 

It's worth noting that the specific functionality of the F keys can be changed through the settings in the operating system and through the use of keyboard driver software. So, it is recommended to refer to the user manual of your laptop or check the settings of your operating system to find out the specific function of the F keys.