You can reassign functions and keys.

    To redefine a keyboard key, use either of the following methods:

    o  Create a key definition file. This is a text file with
       individual key definitions in the form of DEFINE/KEY
       statements and DELETE/KEY statements.

    o  Use the DEF KEY function (see DEF KEY Function).

    The following example establishes a TELNET/TN3270 connection
    to host JUNCO. By default, the terminal functions as if it were
    an IBM-3278-2 model terminal. It uses your customized keyboard
    definition file NEW_KEYS.DAT.

    $ TN3270 JUNCO /KEY_DEFINITION=NEW_KEYS.DAT

    You can also reassign the following functions:

    o  All emulated functions

    o  Most IBM 3270 model functions

    o  All emulated alphanumeric and graphic characters

1  –  Definable Keys

    The keys you can define include:

    Type of Key              Key Name

    Function keys            PF1 through PF4
    (VT100 and VT200)

    Application keys         KP0 through KP9
    (VT100 and VT200)        ENTER
                             MINUS
                             COMMA
                             PERIOD

    Top-row function keys    F6 through F20
    (VT200)                  HELP (F15)
                             DO (F16)

    Editing keypad (E1       FIND (E1)
    through E6)              INSERT_HERE (E2)
    (VT200)                  REMOVE (E3)
                             SELECT (E4)
                             PREV_SCREEN (E5)
                             NEXT_SCREEN (E6)

    Cursor keys              UP
    (VT100 and VT200)        DOWN
                             LEFT
                             RIGHT

    Control keys             Ctrl/A through Ctrl/Z, including:
    (VT100 and VT200)
                             Ctrl/H (BS)
                             Ctrl/I (HT)
                             Ctrl/J (LF)
                             Ctrl/M (CR)

                             Excluding:

                             Ctrl/Y-Interrupt
                             Ctrl/C-Cancel/interrupt
                             Ctrl/O-Output off/on
                             Ctrl/S-Suspend output
                             Ctrl/Q-Resume output

2  –  Nondefinable Keys

    You cannot redefine the following reserved keys:

    o  Ctrl/Y - Interrupt

    o  Ctrl/C - Cancel/interrupt

    o  Ctrl/O - Output off/on

    o  Ctrl/S - Suspend output

    o  Ctrl/Q - Resume output

    o  F1-F5

3  –  Key Definition File

    Use the DEFINE/KEY and DELETE/KEY statements to create your own
    key definition file, as described in the following sections.

    The DEFINE/KEY statement assigns a new function to a particular
    key:

    DEFINE/KEY [/STATE=EXTEND] key_name function

    /STATE         Optional. Default: nonextend mode.
                   Redefines the key in extend mode.
    key_name       Standard key name.
    function       TN3270 function you want mapped to this key.

    You can define most of the named keys both in normal (nonextend)
    mode and in extend mode.

    You can define the control keys (and the synonyms for them) in
    normal mode only. Do not specify the qualifier /STATE=EXTEND.

    The following example assigns the EXIT function to the key
    sequence EXT + Z :

    $ DEFINE/KEY/STATE=EXTEND "Z" EXIT

    The DELETE/KEY statement removes the function assigned to a
    particular key. Use the following format:

    DELETE/KEY [/STATE=EXTEND] key_name

    /STATE         Optional. Default: nonextend mode. Deletes the key
                   in extend mode.
    key_name       Standard key name.

4  –  DEF KEY Function

    Use the DEF KEY function to define or redefine a key
    interactively. Your new definition exists until you log out from
    the remote host or disconnect from it.

    When you invoke the DEF KEY function, TN3270 displays a prompt
    in the status line at the bottom of your screen. What you enter
    during the DEF KEY dialog is subject to translation from the
    National Character Set to the DMCS.

    You cannot redefine a key that exists on your terminal if it
    lacks a DMCS equivalent.