What is the use of the nine keys of F1 and F9 on the computer?

F1: If you are in a selected program and need help, press F1. If you are not in any program, but in Resource Manager or Desktop, press F1 and the Windows helper will appear.

If you're working on a program and want Windows help, you'll need to press Win F1. Press shift+f1 and it will appear"what's this?"for help information.

F2: If a file or folder is selected in Explorer, pressing F2 will rename the selected file or folder. f3：

Press F3 in Explorer or on the desktop to display the "Search Files" window, so if you want to search for files in a folder, you can quickly open the search window by pressing the F3 key, and the search scope is already set to that folder by default. Similarly, press it in Windows Media Player and a window that says "Add to Library by Searching for Your Computer" will appear. f4：

This key is used to open the address bar list in IE, and to close the IE window, you can use the Alt F4 key combination. F5: Used to refresh the contents of the window currently in IE or Explorer.

Doesn't work in windows. But in the DOS window, it works, give it a try! f8：

You can use it to display the startup menu when you start up your computer. Some computers can also press this key at the beginning of the computer boot to quickly bring up the boot settings menu, from which you can quickly choose whether to boot on a floppy disk, a CD, or directly with a hard disk, without having to go into the BIOS to modify the boot sequence. In addition, it is possible to accept Microsoft's installation agreement when installing Windows.

F9: Again it doesn't work in Windows. But in Windows Media Player, it can be used to quickly lower the volume.

F10: Used to activate the menu in Windows or programs, pressing Shift F10 will bring up the right-click shortcut menu. It does the same thing as the application key in the keyboard.

Whereas, in Windows Media Player, its function is to increase the volume. F11: You can make the current explorer or IE full-screen.

F12: Again it doesn't work in Windows. But in Word, pressing it will quickly pop up the Save as File window.

1. According to the principle of using compound keys, there is a "FN" button in the lower left part of the keyboard, and the corresponding function marked on the adapter will be realized only after holding down "FN" and then pressing the F1-F12 keys.

2. When you press F1-F12 alone, it is the function of F1-F12. So if you press these keys individually, then it can only be said that they will not play an adjustment function.

F1 - Introduction to the function of the F12 key.

F1: Help If you need help with a selected program, press F1, or if you need help with a program, press Win + F1.

F2: Rename key Select a folder and press F2 to rename the folder.

F5: Refresh key is used to refresh the content of the IE or the current window.

F7: Not useful in Windows, but in DOS you can enter character C.

F8: You can use it to display the boot menu when you start up your computer.

F9: Doesn't have any use in Windows, but can be used to quickly lower the sound in Windows Media Player.

F10: Used to activate the menu in Windwos or the program, pressing Shift+F10 will bring up the context menu. In Windows Media Player, the effect is to quickly increase the volume.

F11: It is possible to make the explorer or IE window full screen.

F12: Doesn't work in windwos, but in word it pops up a save as window.