X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=doc%2Fman1%2Fnotmuch.rst;fp=doc%2Fman1%2Fnotmuch.rst;h=48351588a3eafc7a20ed69161fa2ae44485c7486;hp=fecfd08a360d0143586352387a5016a1fd25ee2f;hb=dd9112e7d8e89e8566b90379f5f3b1461a2d2845;hpb=7f6aae4f64add17d9750d2d8491930e15fad4fe1

diff --git a/doc/man1/notmuch.rst b/doc/man1/notmuch.rst
index fecfd08a..48351588 100644
--- a/doc/man1/notmuch.rst
+++ b/doc/man1/notmuch.rst
@@ -48,7 +48,9 @@ Supported global options for ``notmuch`` include
 
 ``--config=FILE``
     Specify the configuration file to use. This overrides any
-    configuration file specified by ${NOTMUCH\_CONFIG}.
+    configuration file specified by ${NOTMUCH\_CONFIG}. The empty
+    string is a permitted and sometimes useful value of *FILE*, which
+    tells ``notmuch`` to use only configuration metadata from the database.
 
 ``--uuid=HEX``
     Enforce that the database UUID (a unique identifier which persists