VAXTPU SET(SCROLLING) — VMS 5.2

 SET(SCROLLING)

 Determines scrolling of existing lines in a window to make room for new
 lines at the bottom or top.  As the window is scrolled, the cursor
 position remains in the same column.

 Syntax

    SET (SCROLLING, window, {OFF | ON}, integer1, integer2, integer3)

 Parameters

    window     The window in which scrolling limits are to be set.

    OFF        Disables scrolling.  The screen is repainted each time a
               scroll would otherwise occur.

    ON         Enables scrolling.

    integer1   The offset from the top screen line of the window,
               identifying the top limit of an area in which the cursor can
               move as it tracks the current character position.  If the
               cursor moves above this screen line, lines in the window
               scroll down so the cursor stays within the limits of the
               cursor area.

    integer2   The offset from the bottom screen line of the window,
               identifying the bottom limit of an area in which the cursor
               can move as it tracks the current character position.  If
               the cursor moves below this screen line, lines in the window
               scroll up so the cursor stays within the limits of the
               cursor area.

    integer3   A number specifying how many lines from the top or bottom of
               the cursor area (defined by integer1 and integer2) the
               cursor should be positioned when a window is scrolled.  For
               example, if the bottom of the cursor area is 14 and integer3
               is 0, when text is scrolled up, the cursor is put on screen
               line 14.  If integer3 is 3, the cursor is put on screen line
               11.

 Examples

 1.  SET (SCROLLING, main_window, ON, 0, 0, 2);

     Causes the main window to scroll as follows:  when the cursor reaches
     the top or bottom of the window, lines are moved off the screen to
     make room for new lines.  The cursor is positioned on a line that is
     offset 2 lines from the either the top or bottom, depending on the
     direction in which you are scrolling.

 2.  SET (SCROLLING, main_window, ON, 0, 0, 2);

     Does the same thing as Example 1 -- except, if the main window is 21
     lines long, the cursor is repositioned at the top or bottom of the
     window, depending on the direction in which you are scrolling.  Thus,
     each time a scrolling occurs, an entire window's worth of text
     appears.

 Related topics

    SCROLL   SET(CROSS_WINDOW_BOUNDS)   SET(FORWARD)   SET(REVERSE)
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VAXTPU SET(SCROLLING) — VMS 5.2
