Scroll Lock is a lock key on IBM-compatible keyboards. Originally designed to modify arrow key behavior. Pressing Ctrl+Scroll Lock acts like Ctrl+Pause/Break. Modern programs like Excel and LibreOffice still use this behavior
Mouse keys uses keyboard as pointing device in graphical interfaces. Roots trace back to early visual editors with arrow keys. Standardized with X Window System in 1984
Backspace moves carriage one position backwards in typewriters. Modern computers move cursor and delete character at that position. Key may be labeled as delete, erase, or with left pointing arrow. Mac keyboards have two delete keys: backspace and delete
Laptops use Fn+key combinations for volume adjustment. Desktop keyboards may have dedicated volume wheels. Some keyboards have separate volume buttons
Windows keyboards typically have 104 keys, including Pause Break. Pause Break key combines Pause and Break functions on modern keyboards. Used for stopping commands, games, and BIOS boot-up. Windows+Pause Break opens System properties window
Full screen mode enables detailed viewing of videos and games. Mode can be activated by clicking the full screen icon