CMDLINE(OPCSDEFS)      Optical Printer Control System         CMDLINE(OPCSDEFS)

    NAME
        cmdline - set the OPCS command line editing style

    SYNOPSIS
        cmdline [dos|editor]

            dos    - Old MS-DOS style command line editing (F1, F3, F5..)
            editor - New interactive command line editing with history

    EXAMPLES
        cmdline dos     -- old style command line editing (pre-K200)
        cmdline editor  -- enable new interactive command line editor

    DESCRIPTION
        New in K200 and up, this command lets you change the OPCS command
        line to respond to interactive text editing keystrokes, allowing
        Insert/Delete and Left/Right arrows for line editing, 
        and Up/Down arrow keys for command history.

        'cmdline dos'
        -------------
        This is the very old MS DOS style line editing using F2/F3/F5 function
        keys, and left/right arrow keys. It's basically whatever the default
        MS-DOS command line editing provides.

        'cmdline editor'
        ----------------
        This is the new editor style, which supports more interactive line
        editing that people are generally familiar with in interactive
        text editors like MS-DOS 'EDIT', NOTEPAD, etc. Edit keys supported:

             Up Arrow -- previous line in command history      (^P)
             Dn Arrow -- next line in command history          (^N)
             Lt Arrow -- move reverse one char on current line (^B)
             Rt Arrow -- move forward one char on current line (^F)
            Backspace -- backspace and delete                  (^H)
               Delete -- delete character                      (^D)
                 Home -- move to start of current line         (^A)
                  End -- move to end of current line           (^E)
            Ctrl-Home -- jump to top of command history
             Ctrl-End -- jump to bottom of command history (current line)
            Ctrl-Left -- word left
           Ctrl-Right -- word right
                   ^K -- clear to end of line
                   ^U -- clear current line (hit again to 'undo')
                   ^V -- enter next character literally
                  ESC -- clear current line (hit again to 'undo')
                   F3 -- re-type last command
                   F4 -- re-run last command (F3 + Enter)

    SEE ALSO
        OPCS(DOCS) -- See section on COMMAND LINE EDIT KEYS
        QUICKREF(DOCS) -- Camera operator tutorial covers editing keys

    ORIGIN
        Gregory Ercolano, Los Angeles, California 08/21/2020