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    The DOS editing keys

    When you type a line and press Enter, DOS puts a copy of the line in
    an input buffer (a temporary storage place). The line is put in the
    buffer so you can change it and use the line again.

    The DOS editing keys are used to edit the line that is put in the input
    buffer. The keys are described below.


    Key        Description

    Ins        Allows you to insert characters within a line. You are in
               insert mode until you press a DOS editing key.
    Del        Deletes one character in the input buffer. The character in
               the buffer is not displayed and the cursor does not move.
    Esc        Cancels the line currently being displayed. The buffer re-
               mains unchanged.
    Backspace  Deletes one character from the current line. The buffer re-
    or <-      mains unchanged.
    F1 or ->   Displays one character from the buffer each time it is
               pressed.
    F2 char    Displays all characters up to specified character if the
               character is in the buffer.
    F3         Displays all characters in the buffer, from current cursor
               position to the end of the line.
    F4 char    Deletes all characters up to but not including the specified
               character if the character is in the buffer. The characters
               are not displayed and the cursor does not move.
    F5         Accepts the line you edited as the current buffer line.
    F6         Displays a Ctrl-Z character (end-of-file marker)

    Any changes made to the current line can be undone by pressing Esc.
    You can then verify the buffer contents by pressing F3.
    ------------------------------------------------------------------------

    Special keys

    Certain key combinations have special meanings when used in DOS and
    in programs that reads from standard input and writes to standard out-
    put. These are described below. Keep in mind, however, that a program
    can - and frequently does - disable one or more of these functions.


    Key(s)           Description

    Ctrl-Break       Break (abort command)
    or Ctrl-C

    Ctrl-NumLock     Pause (suspend output)
    or Pause
    or Ctrl-S        (Ctrl-S toggles on/off)

    Shift-PrtScr     Print screen (make a hard copy)

    Ctrl-PrtScr      Printer echo (output also sent to printer)
    or Ctrl-P        (toggle on/off)

    Alt-Ctrl-F1      Selects American keyboard standard
    Alt-Ctrl-F2      Selects installed (national) keyboard driver

    Alt-Ctrl-Del     System reset (reboots the computer)
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