Hallo, The 3rd led it is light when pressed Scroll Lock key on keyboard, now it is not more used but in Windows and programs but it is still constructed on keyboard as a standard. On construction this key was used in correlation with Ctrl key -system properties, and also when it is press the arrows works a page-up or page-down. But now it is more common to use the wheel from mouse to scroll down or up a page. ;-)
Answers & Comments
Hallo,
The 3rd led it is light when pressed Scroll Lock key on keyboard, now it is not more used but in Windows and programs but it is still constructed on keyboard as a standard.
On construction this key was used in correlation with Ctrl key -system properties, and also when it is press the arrows works a page-up or page-down.
But now it is more common to use the wheel from mouse to scroll down or up a page. ;-)