Scroll Lock key is so infrequently used, it might not be on your keyboard at all especially if it’s a compact or laptop keyboard. However, you can easily remap the Scroll Lock to serve a more useful ...
Ctrl + M: Enter Mark mode (allows you to select text with mouse). Once Mark mode is enabled, you can use the arrow keys to move the cursor around. Shift + Up or Down: Move cursor up or down one line ...