``?``
Display full set of key bindings
+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|
+
.. _show-copy:
Copy to kill-ring