The SCROLL command is used to view display contents that are not
    currently visible in a display's screen window. Using the SCROLL
    command, you can move the screen window up or down over the text
    of the display. You can also move it left or right. By scrolling,
    you can see all parts of a large display, even though only a
    small part may fit in the display's window at any one time.

    The easiest way to use the SCROLL command is to use the
    predefined scrolling keys (see the Keypad entry in PCA HELP for
    PCA key definitions).