diff --git a/runtime/doc/diff.txt b/runtime/doc/diff.txt
index b39e721..aaf21b0 100644
--- a/runtime/doc/diff.txt
+++ b/runtime/doc/diff.txt
@@ -1,4 +1,4 @@
-*diff.txt*      For Vim version 7.0aa.  Last change: 2006 Jan 22
+*diff.txt*      For Vim version 7.0aa.  Last change: 2006 Feb 18
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -41,6 +41,10 @@
 
 This only works when a standard "diff" command is available.  See 'diffexpr'.
 
+Diffs are local to the current tab page |tab-page|.  You can't see diffs with
+a window in another tab page.  This does make it possible to have several
+diffs at the same time, each in their own tab page.
+
 What happens is that Vim opens a window for each of the files.  This is like
 using the |-O| argument.  This uses vertical splits.  If you prefer horizontal
 splits add the |-o| argument: >
@@ -113,7 +117,7 @@
 							*:diffo* *:diffoff*
 :diffoff	Switch off diff mode for the current window.
 
-:diffoff!	Switch off diff mode for all windows.
+:diffoff!	Switch off diff mode for all windows in the current tab page.
 
 The ":diffoff" command resets the relevant options to their default value.
 This may be different from what the values were before diff mode was started,