Function key Description F1 Provides help on our task. F2 Rename select item. F3 Running order command. F4 Repeating previous order command. F5 Refresh. F6 Take the address bar in some browser. F7 Spelling and grammar option. F8 Window recovery system. F9 Update document. F10 Select the menu bar in the active program. F11 Enter and exit full-screen mode. F12 Save as dialog box.