Question: what does scroll lock do on windows 10

title: Scroll lock
text: In conjunction with the alternative DOS keyboard and console drivers FreeKEYB and K3PLUS , Scroll Lock also served as part of a copy & paste facility between applications . Compared to the standard keyboard driver KEYB these drivers offered a number of extensions including an extended keystroke buffer with key stacking facility , macro recorder and a second cursor called CopyCursor , which could be invoked on demand ( by default on pressing Ctrl + Alt + F11 or the middle mouse button ) and freely moved on the screen using the cursor keys or the mouse , even outside the area reachable by the standard cursor in the running application . Once invoked , pressing F11 ( or the left mouse button ) the characters under the CopyCursor could be stuffed , one after another , into the keyboard buffer , from where they would be read by the running application as emulated key ( or Alt Numpad ) input , thereby typically showing up at the location of the standard cursor . The CopyCursor would move to the next screen position after each F11 ( or backwards with each ⇧ Shift + F11 ) . Normal keyboard input was still possible while the CopyCursor was enabled , and the user could switch between the two cursors by toggling the Ctrl + Alt + F11 hotkey again . Pressing Esc or ↵ Enter would exit the CopyCursor , so that , on its next invocation , it would show up at the position of the standard cursor again rather than at its previous location . If the screen contents was scrolled , the position of the CopyCursor would move accordingly until reaching the display limits . With Scroll Lock activated , keypresses would still reach the normal keystroke buffer , while CopyCursor input would be stacked up internally for later use in a second queue , dynamically maintained within the extended keystroke buffer . Thereby , it was possible to `` collect '' selected screen output from different programs and spool out the data much later while within yet another application by toggling Scroll Lock off again . It was also possible to use this as input into the macro recorder for later use as scrap macro . Since this was an integral part of these keyboard drivers , it was fully transparent to running software and therefore worked with virtually any DOS programs , including at the command prompt , temporary shelled programs and task switchers .