The ScrollByPage command indicates scrolling up or down one page in a scrolling window. (The number of records in a page is one fewer than the number of records currently displayed in the scrolling window.)
ScrollByPage [ up | down ] scrollwin scrolling_window_name
• up | down - This parameter indicates the direction the scroll box will move. The items in the scrolling window will move in the opposite direction.
• scrolling_window_name - The name of the scrolling window that is being scrolled.
Pressing the PgUp or PgDn key on an extended keyboard or clicking in the scroll bar causes the scrolling window to scroll up or down one page.