Variable: org-beamer-subtitle-format
org-beamer-subtitle-format is a customizable variable defined in
ox-beamer.el.gz.
Value
"\\subtitle{%s}"
Documentation
Format string used for transcoded subtitle.
The format string should have at most one "%s"-expression, which is replaced with the subtitle.
This variable was added, or its default value changed, in Org version
8.3.
Source Code
;; Defined in /usr/src/emacs/lisp/org/ox-beamer.el.gz
(defcustom org-beamer-subtitle-format "\\subtitle{%s}"
"Format string used for transcoded subtitle.
The format string should have at most one \"%s\"-expression,
which is replaced with the subtitle."
:group 'org-export-beamer
:version "26.1"
:package-version '(Org . "8.3")
:type '(string :tag "Format string"))