VT100: Right arrow or       VT200: Right arrow or Left arrow
    Left arrow
    DEFINE_KEY Function: RIGHT, RIGHT_NOWRAP, LEFT, or LEFT_NOWRAP

    Moves the cursor horizontally across your screen without changing
    data you have already entered. Note the following about cursor
    behavior:

    o  If the cursor is at the end of a line when you use the Right
       arrow function, the cursor moves to the start of the next
       line.

    o  If the cursor is at the beginning of a line when you use
       the Left arrow function, the cursor moves to the end of the
       previous line.

       If the screen display you receive is wider than 80 columns,
       you can use the Right arrow and Left arrow functions to move
       through the display.

       If you want the cursor to wrap to the opposite edge of the
       display, use one of the following function sequences:

       EXT + Right arrow

       EXT + Left arrow