Index: layer_vis.h
===================================================================
--- layer_vis.h	(nonexistent)
+++ layer_vis.h	(revision 5489)
@@ -0,0 +1,52 @@
+/*
+ *                            COPYRIGHT
+ *
+ *  PCB, interactive printed circuit board design
+ *  Copyright (C) 1994,1995,1996,2004,2006 Thomas Nau
+ *  Copyright (C) 2016 Tibor 'Igor2' Palinkas (pcb-rnd extensions)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *  Contact addresses for paper mail and Email:
+ *  Thomas Nau, Schlehenweg 15, 88471 Baustetten, Germany
+ *  Thomas.Nau@rz.uni-ulm.de
+ *
+ */
+
+/* Layer visibility logics (affects the GUI and some exporters) */
+
+#ifndef PCB_LAYER_VIS_H
+#define PCB_LAYER_VIS_H
+
+#include "layer.h"
+
+/* Given a string description of a layer visibility stack, adjust the layer
+   visibility to correspond */
+void LayerStringToLayerStack(const char *layer_string);
+
+/* changes the visibility of all layers in a group; returns the number of
+   changed layers */
+int ChangeGroupVisibility(int Layer, pcb_bool On, pcb_bool ChangeStackOrder);
+
+/* resets the layer visibility stack setting */
+void ResetStackAndVisibility(void);
+
+/* saves the layerstack setting */
+void SaveStackAndVisibility(void);
+
+/* restores the layerstack setting */
+void RestoreStackAndVisibility(void);
+
+#endif