+Display of messages can be controlled by the following variables
+
+:index:`notmuch-message-headers`
+ |docstring::notmuch-message-headers|
+
+:index:`notmuch-message-headers-visible`
+ |docstring::notmuch-message-headers-visible|
+
+:index:`notmuch-show-header-line`
+ |docstring::notmuch-show-header-line|
+