diff --git a/DOCS/documentation.html b/DOCS/documentation.html
index 1567518da4..84cca2a09d 100644
--- a/DOCS/documentation.html
+++ b/DOCS/documentation.html
@@ -217,6 +217,7 @@
           <LI><A HREF="#2.6.13">2.6.13 Mirror</A></LI>
           <LI><A HREF="#2.6.14">2.6.14 DVBscale</A></LI>
           <LI><A HREF="#2.6.15">2.6.15 Cropdetect</A></LI>
+          <LI><A HREF="#2.6.16">2.6.16 Rectangle</A></LI>
         </UL>
       </LI>
     </UL>
@@ -1273,6 +1274,19 @@ screen, although input works with xawtv or similar, then try to use the
 <P><CODE>&nbsp;&nbsp;-vop cropdetect[=limit]</CODE></P>
 
 
+<P><A NAME=2.6.16><B>2.6.16.  Rectangle</B></A></P>
+
+<P><B><U>Description</U></B>:</P>
+
+<P>Draws a white rectangle of the requested width and height at the designated
+  coordinates over the image.  Useful to get visual feedback for the parameters
+  of <CODE>-vop crop</CODE> before applying them.</P>
+
+<P><B><U>Usage</U></B>:</P>
+
+<P><CODE>&nbsp;&nbsp;-vop rectangle[=width:height:x:y]</CODE></P>
+
+
 <P><B><A NAME=3>3. Usage</A></B></P>
 
 <P><B><A NAME=3.1>3.1. Command line</A></B></P>
diff --git a/DOCS/mplayer.1 b/DOCS/mplayer.1
index 0beb04c802..939f3ed0e6 100644
--- a/DOCS/mplayer.1
+++ b/DOCS/mplayer.1
@@ -498,6 +498,7 @@ Activate comma separated list of video filters (see documentation).
 Available plugins are:
 
     crop[=w:h:x:y]      cropping
+    rectangle[=w:h:x:y] shows cropping boundaries
     expand[=w:h:x:y:o]  expanding and OSD
     flip                vertical mirroring
     mirror              horizontal mirroring