Editing Print Screen (section)

==Original use==
Under [[Command line interface|command-line]] based [[operating system]]s such as [[MS-DOS]], this key causes the contents of the current [[text mode]] [[Computer display|screen]] memory buffer to be copied to the standard printer [[Computer port (hardware)|port]], usually LPT1. In essence, whatever is currently on the screen when the key is pressed will be printed. Pressing the {{key press|[[control key|Ctrl]]}} key in combination with {{key press|Prt Sc}} turns on and off the "printer echo" feature. When echo is in effect, any conventional text output to the screen will be copied ("echoed") to the printer. There is also a Unicode character for print screen, {{Unichar|2399|print screen symbol}}.