The SCROLL command provides a means of quickly scanning
 through a large window without changing the current
 selection of information within that window.

 To SCROLL a window it must either be selected or it must
 be the only window in the display.  The window may then
 be scrolled vertically by a specific number of lines or
 horizontally by a specific number of fields.  Entering a
 SCROLL LEFT or SCROLL RIGHT command will cause the window
 to scroll left or right respectively.  Entering a SCROLL
 UP or SCROLL down command will cause the data area of the
 window to scroll up or down respectively.  The header will
 remain stationary.

 It is important to note that the left, right and bottom
 border lines, or the lack thereof, as well as lines which
 separate fields where the lines join the header portion
 of the window, serve as indication that the window has
 been scrolled left, right, down or up.  There may be
 pertinent information which is not currently visible.

Format:

        SCROLL UP value
        SCROLL DOWN value
        SCROLL LEFT value
        SCROLL RIGHT value

 Note:  If AUTO_POSITIONING is turned ON, other windows
        on the screen may be repositioned as the selected
        window is scrolled.

        The arrow keys may be redefined as SCROLL commands.
        For more information see HELP SET FUNCTION.