F1 to F12 keys R THESE KEYS WORKS ONLY IN WINDOWS ? OR WORKS SOMEWHERE ELSE ?

F1
Almost always used as the help key, almost every
program will open the help screen when this key is
pressed.
Enter CMOS Setup.
Windows Key + F1 would open the Microsoft
Windows help and support center.
Open the Task Pane.

F2
In Windows renames a highlighted icon, file, or
folder in all versions of Windows.
Alt + Ctrl + F2 opens document window in Microsoft
Word.
Ctrl + F2 displays the print preview window in Microsoft Word.
Quickly rename a selected file or folder.
Enter CMOS Setup.

F3
Often opens a search
feature for many programs
including Microsoft Windows when at the Windows
Desktop..
In MS-DOS or Windows command line F3 will repeat
the last command.
Shift + F3 will change the text in Microsoft Word
from upper to lower case or a capital letter at the
beginning of every word.
Windows Key + F3 opens the Advanced find window
in Microsoft Outlook.
Open Mission Control on an Apple computer running
Mac OS X.

F4
Open find window in Windows 95 to XP.
Open the address bar in Windows Explorer and
Internet Explorer.
Repeat the last action performed (Word 2000+)
Alt + F4 will close the program window currently
active in Microsoft Windows.
Ctrl + F4 will close the open window within the
current active window in Microsoft Windows.

F5
In all modern Internet browsers pressing F5 will
refresh or reload the page or document window.
Open the find, replace, and go to window in
Microsoft Word.
Starts a slideshow in PowerPoint.

F6
Move the cursor to the Address bar in Internet
Explorer, Mozilla Firefox, and most other Internet
browsers.
Ctrl + Shift + F6 opens to another open Microsoft
Word document.

F7
Commonly used to spell check and grammar check
a document in Microsoft programs such as
Microsoft Word, Outlook, etc.
Shift + F7 runs a Thesaurus check on the word
highlighted.
Turns on Caret browsing in Mozilla Firefox.

F8
Function key used to enter the Windows startup
menu, commonly used to access Windows Safe
Mode.

F9
Opens the Measurements toolbar in Quark 5.0.
With Mac OS 10.3 or later shows all open Windows.
Using the Fn key and F9 at the same time will open
Mission Control on an Apple computer running Mac
OS X.

F10
In Microsoft Windows activates the menu bar of an
open application.
Shift + F10 is the same as right-clicking on a
highlighted icon, file, or Internet link.
Access the hidden recovery partition on HP and
Sony computers.
Enter CMOS Setup.
With Mac OS 10.3 or later shows all open Windows
for active program.

F11
Full-screen mode in all modern Internet browsers.
Ctrl + F11 as computer is starting to access the
hidden recovery partition on many Dell computers.
Access the hidden recovery partition on eMachines,
Gateway, and Lenovo computers.
With Mac OS 10.4 or later hides all open windows
and shows the Desktop.

F12
Open the Save as window in Microsoft Word.
Shift + F12 save the Microsoft Word document.
Ctrl + Shift + F12 prints a document in Microsoft
Word.
Preview a page in Microsoft Expression Web
Open Firebug.
With an Apple running Mac OS 10.4 or later F12 will
show or hides the Dashboard.

F13 - F24
Early IBM computers also had keyboards with F13
through F24 keys. However, because these
keyboards are no longer used they are not listed on
this page.