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The Scroll Lock key was meant to lock all scrolling techniques, and is a remnant from the original IBM PC keyboard, though it is not used by most modern-day software. In the original design, Scroll Lock was intended to modify the behavior of the arrow keys. When the Scroll Lock mode was on, the arrow keys would scroll the contents of a text window instead of moving the cursor. In this usage, Scroll Lock is a toggling lock key like Num Lock or Caps Lock, which have a state that persists after the key is released.
Today, this particular use of Scroll Lock is rare. Only a few modern programs still honor this behavior, such as Lotus Notes, Forté Agent, FL Studio, Renoise and Microsoft Excel. Most GUI environments neglect scroll lock, which means scrolling must be accomplished with a computer mouse, using means such as scrollbars or scroll wheels. Therefore, the Scroll Lock key is little used in almost all current programs and operating systems.
