Almost all keyboard has a set of Function keys starting from F1 to F12. These keys combined with Alt and Ctrl keys to make useful keyboard shortcuts. The use of each keys are organized by the operating system installed on the computer and the software program we are using.
Lets start with the F1 key. Help system is an important thing for all programs. F1 key invokes the help function in a program.
F1 + Windows key invokes Windows help.
Use F2 to rename files easily.
F3 for search files and folders.
Close programs. In Microsoft Windows, pressing Alt + F4 to close the currently active program.
Desktop files to taskbar
Start menu for entering safe mode
Menu bar in firefox
Full screen mode
Open save as window in Office