X-Git-Url: https://git.notmuchmail.org/git?a=blobdiff_plain;ds=sidebyside;f=doc%2Fman1%2Fnotmuch-config.rst;h=7347ad316ef16bef6dd1fe7b0789c1e697bef122;hb=aba7fb375bf4edad5da40134b4e7a390a881792b;hp=899098084ae2beafea74017b3064de261c0a8917;hpb=f7130468d27c4f37d45e6aa60baacfc3329ccff4;p=notmuch

diff --git a/doc/man1/notmuch-config.rst b/doc/man1/notmuch-config.rst
index 89909808..7347ad31 100644
--- a/doc/man1/notmuch-config.rst
+++ b/doc/man1/notmuch-config.rst
@@ -38,7 +38,7 @@ programmatically as described in the SYNOPSIS above.
     Every configuration item is printed to stdout, each on a separate
     line of the form::
 
-        *section*.\ *item*\ =\ *value*
+        section.item=value
 
     No additional whitespace surrounds the dot or equals sign
     characters. In a multiple-value item (a list), the values are
@@ -195,6 +195,15 @@ The available configuration items are described below.
 
     Default: ``auto``.
 
+**index.header.<prefix>** **[STORED IN DATABASE]**
+    Define the query prefix <prefix>, based on a mail header. For
+    example ``index.header.List=List-Id`` will add a probabilistic
+    prefix ``List:`` that searches the ``List-Id`` field.  User
+    defined prefixes must not start with 'a'...'z'; in particular
+    adding a prefix with same name as a predefined prefix is not
+    supported. See **notmuch-search-terms(7)** for a list of existing
+    prefixes, and an explanation of probabilistic prefixes.
+
 **built_with.<name>**
     Compile time feature <name>. Current possibilities include
     "compact" (see **notmuch-compact(1)**) and "field_processor" (see