diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 17201b4..4879a64 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -1,4 +1,4 @@
-*options.txt*	For Vim version 7.0aa.  Last change: 2004 Sep 04
+*options.txt*	For Vim version 7.0aa.  Last change: 2004 Oct 07
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -954,6 +954,12 @@
 	prefer using ".bak", but make sure that you don't have files with
 	".bak" that you want to keep.
 
+	If you like to keep a lot of backups, you could use a BufWritePre
+	autocommand to change 'backupext' just before writing the file to
+	include a timestamp. >
+		:au BufWritePre * let &bex = '-' . strftime("%Y%b%d%X") . '~'
+<	Use 'backupdir' to put the backup in a different directory.
+
 						*'backupskip'* *'bsk'*
 'backupskip' 'bsk'	string	(default: "/tmp/*,$TMPDIR/*,$TMP/*,$TEMP/*")
 			global