Index: index.html
===================================================================
--- index.html	(revision 19429)
+++ index.html	(revision 19430)
@@ -39,9 +39,13 @@
 </ul>
 <p>
 When supplements are specified, it's a comma separated list of key=value pairs.
+Available supplements are:
+<ul>
+	<li> purpose: specify matching layer group purpose field
+	<li> bloat: bloat or shrink objects by the specified value (e.g. 1mm)
+	<li> (TODO: supplement for inversion)
+</ul>
 <p>
-(TODO: supplement for inversion)
-<p>
 Examples:
 <table border=1 cellspacing=0>
 	<tr> <th> directive