I have a Vaio laptop and the <kbd>F3</kbd> buttons doesn't work <kbd>F3</kbd> + <kbd>Fn</kbd> changes volmune and same with <kbd>Ctrl</kbd> + <kbd>F3</kbd> + <kbd>Fn</kbd> there is no <kbd>Fn</kbd> lock button, How do I open the coordinates especially since I get lost all the time. Also, how do I use display markers on a map? I tried using maps and searching on the internet.