What is the scroll?

Time has elapsed based on the Scroll Lock key, rendering an addition to the IBM-PC keyboard. Once she had a legitimate function: since many monitors could only display 25 lines of text at a time, programming long string of commands has often become problematic. The shift lock key allowed users to freeze the current screen on site so that the cursor could easily be redirected. Without this function, a programmer working on line 117 could manually move back to line two for a short correction. This was time consuming during the complex programming session.

The development of navigational scrolls eventually made this key virtually unnecessary. Some computer games still use them to allow players access to stocks or provide easier navigation via screens, and table programs also use the function as a form of a surrogate symbol - the user may want to visit the previous block of text without losing his current position. For most of the otherH Mpoty consumption of Odern, Navigation Cronning and Direction Cursor Arrows largely meet this need.

In an effort to keep up with the needs of the IBM consumer keyboard and others, they have expanded the original keyboard to include the directional key and one function for calculations. This expansion also allowed separate function keys such as number (or NUM), Svit Lock, Caps and Sysrq lock. With the exception of the CAPS lock key, all these functions were largely included in history. The number of the number of the number lock was practically replaced by separate navigation and numerical input keyboards. The Sysrq key never had a function - it was strictly created for a future function that did not take place.

Many computer keyboards do not contain the lock key, although several yes, perhaps for nostalgic purposes.