With the exception of the Scroll Lock key in Microsoft Excel, there’s very little the average person can do with these keys. These keys are old and not commonly used - if you wondered who was using them, the answer is very few people. This shortcut functions similarly to Ctrl+C, which is also used to terminate applications in command-line environments. The Break key can be used to end DOS applications - pressing Ctrl+Break terminates a DOS application. This can allow you to read BIOS POST (power-on self-test) messages that flash on your screen for a short time. The Pause key can also pause many computers during the BIOS boot-up process. Press another key after pausing and the program will continue. Depending on how the program is written, this may also pause the program’s execution. When you press Pause, the output scrolling down your screen will stop. The Pause key is designed to pause a text-mode program’s output - it still works in the Command Prompt window on Windows. Scroll Lock is a toggle, just like Caps Lock and Num Lock - on some keyboards, Scroll Lock may also have a dedicated light. Image Credit: solylunafamilia on Flickr Scroll Lock One notable exception is Linux, where the “Magic SysRq key” can send commands directly to the Linux kernel to help recover from crashes and debug the operating system. These days, most operating systems and programs will simply ignore this key-press event. The operating system can listen for the event and do something special. it behaves differently from other keys on your keyboard - when you press this key, your computer’s BIOS generates a special interrupt that tells the operating system the key was pressed. This key was meant for invoking low-level operating system functions.

To actually invoke the System Request key, you’d need to press Alt+SysRq. These days, keyboards generally combine the SysRq key with the Print Screen (or Prt Scr) key. The SysRq key (sometimes Sys Req) is an abbreviation for System Request.

How to turn off scroll lock on razer