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
Additional Information:
explode
extract