Welcome to Computer Gyan, Functional keys is one of the important topic of keyboard. Which shows user smarty. Functional keys contains 12 different keys or we may say it contain F1 to F12 keys in series. There are different uses of every keys and all those functional keys are very useful for an user. F1 = For Help F2 = F2 for rename, Ctrl + F2 Print Preview F3 = Shift + F3 for Change Case, F4 = Ctrl + F4 for Close window, Alt + F4 for Shutdown F5 = Refresh F6 = use to activate keyboard command in ms word F7 = Spelling & Grammar Check, Ctrl + F7 for Thesaurus F8 = Use for selection in excel F9 = Use for apply refresh in data in excel F10 = Shift + F10 use as Right click F11 = Full Screen on & Off in Browsers F12 = F12 use as save as in MS Word Watch this tutorial and learn all this very easy. . I hope, you will like the video. So keep watching and keep supporting..... Thanks for watching......... . . Follow us on. Instagram - Ecceducation https://www.instagram.com/ecceducation/ . Facebook - Ecc Education https://www.facebook.com/100007644453894/posts/2842869892644465/?app=fbl . Twitter - @educationEcc https://twitter.com/EducationEcc?s=08