horizontal-scroll-bar-mode
horizontal-scroll-bar-mode is an interactive compiled Lisp function in `scroll-bar.el
'.
(horizontal-scroll-bar-mode &optional ARG)
Toggle horizontal scroll bars on all frames (Horizontal Scroll Bar mode).
With a prefix argument ARG, enable Horizontal Scroll Bar mode if
ARG is positive, and disable it otherwise. If called from Lisp,
enable the mode if ARG is omitted or nil.
This command applies to all frames that exist and frames to be
created in the future.