Update info files

diff --git a/doc/info/attrs.html b/doc/info/attrs.html
index cb842a893774e15eeee5ec987cdc824f954fbb41..b0419a9aa5966a22825f9607ad7e2b5447346a5a 100644 (file)
--- a/doc/info/attrs.html
+++ b/doc/info/attrs.html
@@ -278,6 +278,9 @@ This field indicates which graph component uses the attribute.
  <TR><TD><A NAME=a:packmode HREF=#d:packmode>packmode</A>
 </TD><TD>G</TD><TD><A HREF=#k:packMode>packMode</A>
 </TD><TD ALIGN="CENTER">node</TD><TD></TD><TD>not dot</TD> </TR>
+ <TR><TD><A NAME=a:pad HREF=#d:pad>pad</A>
+</TD><TD>G</TD><TD>double<BR><A HREF=#k:pointf>pointf</A>
+</TD><TD ALIGN="CENTER">1<BR>18</TD><TD></TD><TD></TD> </TR>
  <TR><TD><A NAME=a:page HREF=#d:page>page</A>
 </TD><TD>G</TD><TD><A HREF=#k:pointf>pointf</A>
 </TD><TD ALIGN="CENTER"></TD><TD></TD><TD></TD> </TR>
@@ -842,6 +845,12 @@ This field indicates which graph component uses the attribute.
 <DD>  For graphs, this sets x and y margins of canvas, in inches. If the margin
   is a single double, both margins are set equal to the given value.
   <P>
+  Note that the margin is not part of the drawing but just empty space 
+  left around the drawing. It basically corresponds to a translation of 
+  drawing, as would be necessary to center a drawing on a page. Nothing
+  is actually drawn in the margin. To actually extend the background of
+  a drawing, see the <A HREF=#d:pad>pad</A> attribute.
+  <P>
   For nodes, this attribute specifies space left around the node's label.
   By default, the value is <TT>0.11,0.055</TT>.
 
@@ -1013,6 +1022,17 @@ This field indicates which graph component uses the attribute.
   <B>packmode</B> will automatically turn on packing as though one had
   set <B>pack=true</B>.
 
+<DT><A NAME=d:pad HREF=#a:pad><STRONG>pad</STRONG></A>
+<DD>  The pad attribute specifies how much, in inches, to extend the 
+  drawing area around the minimal area needed to draw the graph.
+  If the pad is a single double, both the x and y pad values are set 
+  equal to the given value. This area is part of the
+  drawing and will be filled with the background color, if appropriate. 
+  <P>
+  Normally, a small pad is used for aesthetic reasons, especially when
+  a background color is used, to avoid having nodes and edges abutting
+  the boundary of the drawn region.
+
 <DT><A NAME=d:page HREF=#a:page><STRONG>page</STRONG></A>
 <DD>  Width and height of output pages, in inches. If this is set and is
   smaller than the size of the layout, a rectangular array of pages of
@@ -1232,10 +1252,13 @@ This field indicates which graph component uses the attribute.
 <DT><A NAME=d:splines HREF=#a:splines><STRONG>splines</STRONG></A>
 <DD>  Controls how, and if, edges are represented. If true, edges are drawn as
   splines routed around nodes; if false, edges are drawn as line segments.
-  (Note: at present (1 Jan 2006), setting <TT>splines=false</TT> has no 
-  effect in dot.)
   If set to "", no edges are drawn at all.
   <P>
+  (1 March 2007) The values <TT>line</TT> and <TT>spline</TT> can be
+  used as synonyms for <TT>false</TT> and <TT>true</TT>, respectively.
+  In addition, the value <TT>polyline</TT> specifies that edges should be
+  drawn as polylines.
+  <P>
   By default, the attribute is unset. How this is interpreted depends on
   the layout. For dot, the default is to draw edges as splines. For all
   other layouts, the default is to draw edges as line segments. Note that