Index: trunk/doc/user/02_model/index.html
===================================================================
--- trunk/doc/user/02_model/index.html	(revision 19276)
+++ trunk/doc/user/02_model/index.html	(revision 19277)
@@ -90,7 +90,7 @@
 layers in them. The mask, paste, silk layer groups behave the same and
 can host zero or more logical layers.
 <p>
-Each layer group has a type. Types are:
+Each layer group has a main type. Main types are:
 <ul>
 	<li> <b>copper</b>   for signal layers
 	<li> <b>silk</b>     for silkscreen layers
Index: trunk/src/layer.h
===================================================================
--- trunk/src/layer.h	(revision 19276)
+++ trunk/src/layer.h	(revision 19277)
@@ -43,7 +43,7 @@
 	PCB_LYT_LOGICAL  = 0x00000008, /* does not depend on the layer stackup (typically aux drawing layer) */
 	PCB_LYT_ANYWHERE = 0x000000FF, /* MASK: layer is anywhere on the stack */
 
-	/* What the layer consists of */
+	/* What the layer consists of (main type) */
 	PCB_LYT_COPPER   = 0x00000100, /* copper objects */
 	PCB_LYT_SILK     = 0x00000200, /* silk objects */
 	PCB_LYT_MASK     = 0x00000400, /* solder mask */