diff -r 0c51532ec233 -r 0324a1d88a53 hgext/rebase.py
--- a/hgext/rebase.py	Fri Feb 01 05:40:06 2013 +0100
+++ b/hgext/rebase.py	Fri Feb 01 02:01:11 2013 +0100
@@ -88,6 +88,11 @@
     the whole branch. If you specify neither ``-s`` nor ``-b``, rebase
     uses the parent of the working directory as the base.
 
+    For advanced usage, a third way is available through the ``--rev``
+    option. It allows you to specify an arbitrary set of changesets to
+    rebase. Descendants of revs you specify with this option are not
+    automatically included in the rebase.
+
     By default, rebase recreates the changesets in the source branch
     as descendants of dest and then destroys the originals. Use
     ``--keep`` to preserve the original source changesets. Some