---
 vim/notmuch.txt |  1 +
 vim/notmuch.vim | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/vim/notmuch.txt b/vim/notmuch.txt
index 43741022..5c5d758e 100644
--- a/vim/notmuch.txt
+++ b/vim/notmuch.txt
@@ -77,6 +77,7 @@ p	Save patches
 r	Reply
 ?	Show thread information
 <tab>	Show next message
+<s-tab> Show previous message
 c	Compose a new mail
 
 ------------------------------------------------------------------------------
diff --git a/vim/notmuch.vim b/vim/notmuch.vim
index ad8b7c80..ef40b9ad 100644
--- a/vim/notmuch.vim
+++ b/vim/notmuch.vim
@@ -40,6 +40,7 @@ let g:notmuch_show_maps = {
 	\ 'r':		'show_reply()',
 	\ '?':		'show_info()',
 	\ '<Tab>':	'show_next_msg()',
+	\ '<S-Tab>':	'show_prev_msg()',
 	\ 'c':		'compose()',
 	\ }
 
@@ -128,6 +129,20 @@ ruby << EOF
 EOF
 endfunction
 
+function! s:show_prev_msg()
+ruby << EOF
+	r, c = $curwin.cursor
+	n = $curbuf.line_number
+	i = $messages.index { |m| n >= m.start && n <= m.end }
+	m = $messages[i - 1]
+	if m
+		r = m.body_start + 1
+		VIM::command("normal #{m.start}zt")
+		$curwin.cursor = r, c
+	end
+EOF
+endfunction
+
 function! s:show_reply()
 	ruby open_reply get_message.mail
 	let b:compose_done = 0
-- 
2.21.0

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