Pressing the F1 key opens the Help window in most programs. In Windows Explorer, pressing F2 renames the currently highlighted icon, file or folder. In Microsoft Word, pressing a combination of Alt, Ctrl and F2 opens the Document window. In the same program, pressing Ctrl and F2 opens Print Preview.
Pressing F3 at the Windows desktop and in programs opens the search feature. At the command prompt, F3 repeats the last command. In Microsoft Word, pressing Shift and F3 switches between upper case, lower switch and title case. In Microsoft Outlook, pressing F3 and the Windows key opens the Advanced Find window.
In Internet Explorer and in Windows Explorer, F4 opens the address bar, while in Windows 95 to Windows XP, it opens the Find window. Pressing Alt and F4 closes the active window in Windows Explorer. In most Internet browsers, F5 refreshes the current page. In Microsoft PowerPoint, it starts a slideshow. In Internet browsers, F6 moves the cursor to the address bar.
In Microsoft Office programs, F7 opens spell check and grammar check. Pressing F8 at boot time opens Safe Mode. In Microsoft Word, F9 refreshes the active document. In most programs, F10 opens the menu bar. In Internet browsers, F11 enters and exits full screen. F12, on the other hand, opens the debug tool.