Mention modify operation in main man page

diff --git a/doc/rrdtool.pod b/doc/rrdtool.pod
index fc3147886b0a9b434d03b75fe8ad14aabee81d00..74274bc53f7d63ed2309b72059bcda409657e6b7 100644 (file)
--- a/doc/rrdtool.pod
+++ b/doc/rrdtool.pod
@@ -82,6 +82,10 @@ uses fetch to retrieve its data from an RRD. Check L<rrdfetch>.
 
 Alter setup of an RRD. Check L<rrdtune>.
 
+=item B<modify>
+
+Alter structure of an RRD. Check L<rrdmodify>.
+
 =item B<first>
 
 Find the first update time of an RRD. Check L<rrdfirst>.