reftex-search-document
reftex-search-document is an interactive autoloaded Lisp function in `reftex-global.el
'.
(reftex-search-document &optional REGEXP)
Regexp search through all files of the current document.
Starts always in the master file. Stops when a match is found.
To continue searching for next match, use command M-x tags-loop-continue.
No active TAGS table is required.