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on a dell inspiron laptop F1 is used to connect your laptop to another screen, extend your screen or connect to a projecter. F2 is to connect or unconnect to the internet and F5 is to make the screen lighter

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Q: Why do you use the keys f1 f2 and f5?
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How can you pass the last maze in Dream Chronicles 2 The Eternal Maze?

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Function Kay's can be used with other keys such as the ctrl and alt keys. F1 is the help key, F2 is a highlighting key, F3 opens a search bar, F4 finds window, F5 reloads browser pages, F6 moves the curser, F7 is spell check, F8 safe mode, F9 opens toolbar, F10 activates the menu bar, F11opens full screen mode, and F12 opens the save window. These functions my vary by computer.