Function: global-reveal-mode

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. (fn &optional ARG)

Variable: global-reveal-mode

Non-nil if Global-Reveal mode is enabled.
See the command `global-reveal-mode' for a description of this minor mode.
Setting this variable directly does not take effect;
either customize it (see the info node `Easy Customization')
or call the function `global-reveal-mode'.