+.RS 4
+.TP 4
+.B search.exclude_tags
+A list of tags that will be excluded from search results by
+default. Using an excluded tag in a query will override that
+exclusion.
+.RE
+
+.RS 4
+.TP 4
+.B maildir.synchronize_flags
+If true, then the following maildir flags (in message filenames) will
+be synchronized with the corresponding notmuch tags:
+
+ Flag Tag
+ ---- -------
+ D draft
+ F flagged
+ P passed
+ R replied
+ S unread (added when 'S' flag is not present)
+
+The
+.B notmuch new
+command will notice flag changes in filenames and update tags, while
+the
+.B notmuch tag
+and
+.B notmuch restore
+commands will notice tag changes and update flags in filenames.
+
+If there have been any changes in the maildir (new messages added, old
+ones removed or renamed, maildir flags changed, etc.), it is advisable
+to run
+.B notmuch new
+before
+.B notmuch tag
+or
+.B notmuch restore
+commands to ensure the tag changes are properly synchronized to the
+maildir flags, as the commands expect the database and maildir to be
+in sync.
+.RE
+
+.RE
+.SH ENVIRONMENT
+The following environment variables can be used to control the
+behavior of notmuch.
+.TP
+.B NOTMUCH_CONFIG
+Specifies the location of the notmuch configuration file. Notmuch will
+use ${HOME}/.notmuch\-config if this variable is not set.