SYNTAX            : RANGE CTRL_X

RESULTING ARGUMENT: None

FUNCTION          : This function allows both horizontal and vertical
                    scrolling-regions to be modified at one time.

                    These settings specify the trigger-regions that control
                    how near the cursor is allowed to reach the border of
                    the text area before scrolling begins. It is specified
                    as a number of characters: first horizontal, then
                    vertical.

                    With a special value for the first parameter, this
                    function also controls the size of a TAB character.

RANGE             : -1,TAB-SIZE
RANGE             : HORIZONTAL,VERTICAL
                    TAB-SIZE:   The number of characters a TAB is wide.
                    HORIZONTAL: The number given is the number of
                                characters to remain visible between
                                cursor and window border.
                    VERTICAL  : The number given is one larger than the
                                number of lines to remain visible between
                                cursor and window border. When zero, the
                                half-page jump incorporated in releases
                                up to 4.1 will be activated.

                    The maximum values allowed depend on the active font
                    and the size of the text area. They will always be one
                    half screen in characters.

DEFAULT           : TAB-SIZE:   8
                    HORIZONTAL: 3
                    VERTICAL  : 2

EXAMPLE           : 3 , 0 CTRL_X
                    Set horizontal scrolling-region to 3 and vertical
                    scrolling-region off (half-page jump).

NOTE              : The settings-requester allows comfortable interactive
                    setting of these values on the Amiga.

MATRIX