cua-scroll-downcua-scroll-down is an interactive compiled Lisp function in `
cua-base.el'. (cua-scroll-down &optional ARG) Scroll text of current window downward ARG lines; or near full screen if no ARG. If window cannot be scrolled further, move cursor to top line instead. A near full screen is `next-screen-context-lines' less than a full screen. Negative ARG means scroll upward. If ARG is the atom `-', scroll upward by nearly full screen.