Update info files

diff --git a/doc/info/attrs.html b/doc/info/attrs.html
index 1f741fff292949d30ba8f04f2b178cd34f44adf6..62f17bd9888050e0596522524b25541b1461f505 100644 (file)
--- a/doc/info/attrs.html
+++ b/doc/info/attrs.html
@@ -1850,19 +1850,21 @@ the given types.
   <P>
   The viewPort <TT>W,H,Z,x,y</TT> or <TT>W,H,Z,N</TT>
   specifies a viewport for the final image. The pair (W,H) gives the
-  dimensions (width and height) of the viewport image, in
-  <A HREF=#points>points</A>,
-  in the original graph drawing.
-  The optional Z is the zoom factor, i.e., the resulting image will be
-  Z*W by Z*H points in size. By default, Z is 1.
-  The optional last part is either a pair (x,y) giving the position in the graph, in 
+  dimensions (width and height) of the final image, in
+  <A HREF=#points>points</A>.
+  The optional Z is the zoom factor, i.e., the image in the original layout will be
+  W/Z by H/Z points in size. By default, Z is 1.
+  The optional last part is either a pair (x,y) giving a position in the original layout of the
+  graph, in 
   <A HREF=#points>points</A>, of the center of the viewport, or the name N
   of a node whose center should used as the focus.
   By default, the focus is the center of the graph bounding box, i.e.,
   (bbx/2,bby/2), where "bbx,bby" is the
   value of the bounding box attribute <A HREF=#a:bb>bb</A>.
   <P>
-  Sample values: <TT>50,50,.5,'2.8 BSD'</T> or <TT>100,100,2,450,300</TT>
+  Sample values: <TT>50,50,.5,'2.8 BSD'</T> or <TT>100,100,2,450,300</TT>.
+  The first will take the 100x100 point square centered on the node <TT>2.8 BSD</TT>
+  and scale it down by 0.5, yielding a 50x50 point final image.
 
 </DL>
 </BODY>