Index: trunk/src/layer.h
===================================================================
--- trunk/src/layer.h	(revision 19012)
+++ trunk/src/layer.h	(revision 19013)
@@ -92,7 +92,7 @@
 	PCB_LYC_AUTO = 2        /* bit 1 is 0 for manual drawn layer or 1 for side-effect objects from padstacks; this is how the user controls on which composite mask/paste layer padstack side effects should appear */
 } pcb_layer_combining_t;
 
-#define PCB_LAYER_IN_STACK(lyt) (((lyt) & PCB_LYT_COPPER) || ((lyt) & PCB_LYT_SILK) || ((lyt) & PCB_LYT_MASK) || ((lyt) & PCB_LYT_PASTE))
+#define PCB_LAYER_IN_STACK(lyt) (((lyt) & PCB_LYT_COPPER) || ((lyt) & PCB_LYT_SILK) || ((lyt) & PCB_LYT_MASK) || ((lyt) & PCB_LYT_PASTE) || ((lyt) & PCB_LYT_SUBSTRATE))
 
 
 #include "globalconst.h"
Index: trunk/src_plugins/lib_gtk_common/wt_layersel.c
===================================================================
--- trunk/src_plugins/lib_gtk_common/wt_layersel.c	(revision 19012)
+++ trunk/src_plugins/lib_gtk_common/wt_layersel.c	(revision 19013)
@@ -570,7 +570,7 @@
 	/* first section: editable layer groups participating in the layer stack */
 	for(gid = 0; gid < pcb_max_group(PCB); gid++) {
 		pcb_layergrp_t *g = &PCB->LayerGroups.grp[gid];
-		if (!(PCB_LAYER_IN_STACK(g->ltype)))
+		if (!(PCB_LAYER_IN_STACK(g->ltype)) || (g->ltype & PCB_LYT_SUBSTRATE))
 			continue;
 printf("in-stack:  %s\n", g->name);
 		gtk_box_pack_start(GTK_BOX(ls->grp_box), build_group_real(ls, &ls->grp[gid], g), FALSE, FALSE, 0);
@@ -581,7 +581,7 @@
 	/* second section: editable layer groups not being part of the stack */
 	for(gid = 0; gid < pcb_max_group(PCB); gid++) {
 		pcb_layergrp_t *g = &PCB->LayerGroups.grp[gid];
-		if ((PCB_LAYER_IN_STACK(g->ltype)) || (g->ltype & PCB_LYT_SUBSTRATE))
+		if (PCB_LAYER_IN_STACK(g->ltype))
 			continue;
 		gtk_box_pack_start(GTK_BOX(ls->grp_box), build_group_real(ls, &ls->grp[gid], g), FALSE, FALSE, 0);
 	}