F1 Used as the help key in almost every program Open the Task Pane. F2 In Microsoft Windows, renames a highlighted icon, folder or file, in all versions of Windows. In Microsoft Excel, it edits the active cell. Alt+Ctrl+F2 opens document window in Microsoft Word. Quickly rename a selected folder or file. Enter the CMOS Setup.

F3 Often opens a FIND feature for many programs, including the Microsoft Windows. In Windows or MS-DOS command line F3 will repeat the last command. In the Microsoft Word Ctrl+F3 will lowercase any highlighted text. Shift+F3 will change the text in Microsoft Word from upper to lowercase or a capital letter at the beginning of every word. Windows Key + F3 opens the Advanced find window in the Microsoft Outlook. In Windows Explorer, start the search function.

F4 Open the address bar in the Internet Explorer and the Windows Explorer. Alt+F4 closes program window currently active in the Microsoft Windows. Ctrl+F4 closes the tab in the active window or open window in Microsoft Windows.

F5 In all modern Internet browsers, pressing F5 will reload or refresh the document window or page. Ctrl+F5 forces a complete refresh of a web page. It clears the cache and downloads all contents of the page again. Refresh the list of contents in a folder or a file. Open the find, replace, and go to the window in the Microsoft Word. Starts a slideshow in PowerPoint.

F6 Move the cursor to the address bar in Mozilla Firefox, Internet Explorer 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 Outlook, Word etc. Shift+F7 runs a Thesaurus check on word highlighted. Turns on the Caret Browsing in Mozilla Firefox.

F8 The function key is used to enter the Windows startup menu. It is commonly used to access the Windows Safe Mode.

F9 Refresh document in the Microsoft Word. Send and receive e-mail in the Microsoft Outlook.

F10 In Microsoft Windows, it activates the menu bar of an open application. Shift+F10 is the same as the right-clicking on the highlighted icon, Internet link or file. Enter CMOS Setup on some computers.

F11 Exit and enter fullscreen mode in all modern Internet browsers.

F12 Open the Save as a window in the Microsoft Word. Ctrl+F12 opens a document in the Word. Shift+F12 saves the Microsoft Word document (like Ctrl+S). Ctrl+Shift+F12 prints a document in the Microsoft Word. Preview a page in the Microsoft Expression Web. Open browser debug tool or Firebug.

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