You don't fully know the functions of F1-F12, right?

All keyboards have at least 12 function keys, commonly known as F-keys, which are usually located at the top of the keyboard, ranging from F1 to F12. But do you know the functions of all these keys? Do you know how these keys can save you time? F1: If you need help while in a selected program, press F1. If you're not in any program but in Explorer or on the desktop, pressing F1 will bring up the Windows Help utility. If you're operating within a program and want to access Windows Help, you'll need to press Win+F1. Press S...