patch 7.4.1735
Problem:    It is not possible to only see part of the message history.  It is
            not possible to clear messages.
Solution:   Add a count to ":messages" and a clear argument. (Yasuhiro
            Matsumoto)
diff --git a/runtime/doc/message.txt b/runtime/doc/message.txt
index 56745f3..d41915e 100644
--- a/runtime/doc/message.txt
+++ b/runtime/doc/message.txt
@@ -1,4 +1,4 @@
-*message.txt*   For Vim version 7.4.  Last change: 2016 Feb 27
+*message.txt*   For Vim version 7.4.  Last change: 2016 Apr 14
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -19,6 +19,15 @@
 is especially useful when messages have been overwritten or truncated.  This
 depends on the 'shortmess' option.
 
+	:messages		Show all messages.
+
+	:{count}messages	Show the {count} most recent messages.
+
+	:messages clear		Clear all messages.
+
+	:{count}messages clear	Clear messages, keeping only the {count} most
+				recent ones.
+
 The number of remembered messages is fixed at 20 for the tiny version and 200
 for other versions.
 
@@ -58,8 +67,9 @@
 When an error message is displayed, but it is removed before you could read
 it, you can see it again with: >
   :echo errmsg
-or view a list of recent messages with: >
+Or view a list of recent messages with: >
   :messages
+See `:messages` above.
 
 
 LIST OF MESSAGES