Mention 32bit coordinates support.

documentation/introduction.sgml

diff --git a/documentation/introduction.sgml b/documentation/introduction.sgml
index ab4864b..d5f36ca 100644
--- a/documentation/introduction.sgml
+++ b/documentation/introduction.sgml
@@ -219,7 +219,8 @@
             </listitem>
             <listitem>
               <para>
-                Pretty advanced DirectX support for games
+                32 bit graphical coordinates for CAD applications,
+                pretty advanced DirectX support for games
               </para>
             </listitem>
             <listitem>