global-reveal-mode
global-reveal-mode is an interactive autoloaded compiled Lisp function in `reveal.el
'.
(global-reveal-mode &optional ARG)
Toggle Reveal mode in all buffers (Global Reveal mode).
Reveal mode renders invisible text around point visible again.
With a prefix argument ARG, enable Global Reveal mode if ARG is
positive, and disable it otherwise. If called from Lisp, enable
the mode if ARG is omitted or nil.