Index: src/lang/english.txt
===================================================================
--- src/lang/english.txt	(revision 10002)
+++ src/lang/english.txt	(working copy)
@@ -3225,6 +3225,7 @@
 STR_TRANSPARENT_BUILDINGS_DESC                                  :{BLACK}Toggle transparency for buildables like stations, depots, waypoints and catenary
 STR_TRANSPARENT_BRIDGES_DESC                                    :{BLACK}Toggle transparency for bridges
 STR_TRANSPARENT_STRUCTURES_DESC                                 :{BLACK}Toggle transparency for structures like lighthouses and antennas, maybe in future for eyecandy
+STR_TRANSPARENT_MEMO_DESC                                      :{BLACK}Toggle memorization for active transparencies
 
 ##### Mass Order
 STR_GROUP_NAME_FORMAT                                           :Group {COMMA}
Index: src/main_gui.cpp
===================================================================
--- src/main_gui.cpp	(revision 10002)
+++ src/main_gui.cpp	(working copy)
@@ -153,11 +153,12 @@
 {
 	static byte trans_opt = ~0;
 
-	if (GB(_transparent_opt, 1, 7) == 0) {
-		SB(_transparent_opt, 1, 7, GB(trans_opt, 1, 7));
+	if (GB(_transparent_opt, 2, 8) == 0) {
+	    if (GB(_transparent_opt, 1, 1)) SB(_transparent_opt, 2, 8, GB(trans_opt, 2, 8));
+		else SB(_transparent_opt, 2, 8, ~0);
 	} else {
-		trans_opt = _transparent_opt;
-		SB(_transparent_opt, 1, 7, 0);
+		if (GB(_transparent_opt, 1, 1)) trans_opt = _transparent_opt;
+		SB(_transparent_opt, 2, 8, 0);
 	}
 
 	MarkWholeScreenDirty();
Index: src/openttd.h
===================================================================
--- src/openttd.h	(revision 10002)
+++ src/openttd.h	(working copy)
@@ -183,6 +183,7 @@
 
 enum {
 	TO_SIGNS,
+	TO_MEMO,
 	TO_TREES,
 	TO_HOUSES,
 	TO_INDUSTRIES,
Index: src/transparency_gui.cpp
===================================================================
--- src/transparency_gui.cpp	(revision 10002)
+++ src/transparency_gui.cpp	(working copy)
@@ -15,6 +15,7 @@
 enum TransparencyToolbarWidgets{
 	/* Widgets not toggled when pressing the X key */
 	TTW_WIDGET_SIGNS = 3,    ///< Make signs background transparent
+	TTW_WIDGET_SAVE,         ///< Save the active transparency options
 
 	/* Widgets toggled when pressing the X key */
 	TTW_WIDGET_TREES,        ///< Make trees transparent
@@ -59,24 +60,25 @@
 
 static const Widget _transparency_widgets[] = {
 { WWT_CLOSEBOX,   RESIZE_NONE,  7,   0,  10,   0,  13, STR_00C5,                 STR_018B_CLOSE_WINDOW},
-{  WWT_CAPTION,   RESIZE_NONE,  7,  11, 162,   0,  13, STR_TRANSPARENCY_TOOLB,   STR_018C_WINDOW_TITLE_DRAG_THIS},
-{WWT_STICKYBOX,   RESIZE_NONE,  7, 163, 174,   0,  13, STR_NULL,                 STR_STICKY_BUTTON},
+{  WWT_CAPTION,   RESIZE_NONE,  7,  11, 184,   0,  13, STR_TRANSPARENCY_TOOLB,   STR_018C_WINDOW_TITLE_DRAG_THIS},
+{WWT_STICKYBOX,   RESIZE_NONE,  7, 185, 196,   0,  13, STR_NULL,                 STR_STICKY_BUTTON},
 
 /* transparency widgets:
  * transparent signs, trees, houses, industries, player's buildings, bridges and unmovable structures */
 {   WWT_IMGBTN,   RESIZE_NONE,  7,   0,  21,  14,  35, SPR_IMG_SIGN,         STR_TRANSPARENT_SIGNS_DESC},
-{   WWT_IMGBTN,   RESIZE_NONE,  7,  22,  43,  14,  35, SPR_IMG_PLANTTREES,   STR_TRANSPARENT_TREES_DESC},
-{   WWT_IMGBTN,   RESIZE_NONE,  7,  44,  65,  14,  35, SPR_IMG_TOWN,         STR_TRANSPARENT_HOUSES_DESC},
-{   WWT_IMGBTN,   RESIZE_NONE,  7,  66,  87,  14,  35, SPR_IMG_INDUSTRY,     STR_TRANSPARENT_INDUSTRIES_DESC},
-{   WWT_IMGBTN,   RESIZE_NONE,  7,  88, 109,  14,  35, SPR_IMG_COMPANY_LIST, STR_TRANSPARENT_BUILDINGS_DESC},
-{   WWT_IMGBTN,   RESIZE_NONE,  7, 110, 152,  14,  35, SPR_IMG_BRIDGE,       STR_TRANSPARENT_BRIDGES_DESC},
-{   WWT_IMGBTN,   RESIZE_NONE,  7, 153, 174,  14,  35, SPR_IMG_TRANSMITTER,  STR_TRANSPARENT_STRUCTURES_DESC},
+{   WWT_IMGBTN,   RESIZE_NONE,  7,  22,  43,  14,  35, SPR_IMG_SAVE,         STR_TRANSPARENT_MEMO_DESC},
+{   WWT_IMGBTN,   RESIZE_NONE,  7,  44,  65,  14,  35, SPR_IMG_PLANTTREES,   STR_TRANSPARENT_TREES_DESC},
+{   WWT_IMGBTN,   RESIZE_NONE,  7,  66,  87,  14,  35, SPR_IMG_TOWN,         STR_TRANSPARENT_HOUSES_DESC},
+{   WWT_IMGBTN,   RESIZE_NONE,  7,  88, 109,  14,  35, SPR_IMG_INDUSTRY,     STR_TRANSPARENT_INDUSTRIES_DESC},
+{   WWT_IMGBTN,   RESIZE_NONE,  7, 110, 131,  14,  35, SPR_IMG_COMPANY_LIST, STR_TRANSPARENT_BUILDINGS_DESC},
+{   WWT_IMGBTN,   RESIZE_NONE,  7, 132, 174,  14,  35, SPR_IMG_BRIDGE,       STR_TRANSPARENT_BRIDGES_DESC},
+{   WWT_IMGBTN,   RESIZE_NONE,  7, 175, 196,  14,  35, SPR_IMG_TRANSMITTER,  STR_TRANSPARENT_STRUCTURES_DESC},
 
 {   WIDGETS_END},
 };
 
 static const WindowDesc _transparency_desc = {
-	WDP_ALIGN_TBR, 58+36, 175, 36,
+	WDP_ALIGN_TBR, 58+36, 197, 36,
 	WC_TRANSPARENCY_TOOLBAR, WC_NONE,
 	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_STICKY_BUTTON,
 	_transparency_widgets,