diff --git a/src/terraform_gui.cpp b/src/terraform_gui.cpp
index c869a2bef2..fb9b09b2aa 100644
--- a/src/terraform_gui.cpp
+++ b/src/terraform_gui.cpp
@@ -31,6 +31,7 @@
 #include "tree_map.h"
 #include "landscape_type.h"
 #include "tilehighlight_func.h"
+#include "strings_func.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"
@@ -288,6 +289,13 @@ struct TerraformToolbarWindow : Window {
 		VpSelectTilesWithMethod(pt.x, pt.y, select_method);
 	}
 
+	virtual Point OnInitialPosition(const WindowDesc *desc, int16 sm_width, int16 sm_height, int window_number)
+	{
+		Point pt = GetToolbarAlignedWindowPosition(sm_width);
+		pt.y += sm_height;
+		return pt;
+	}
+
 	virtual void OnPlaceMouseUp(ViewportPlaceMethod select_method, ViewportDragDropSelectionProcess select_proc, Point pt, TileIndex start_tile, TileIndex end_tile)
 	{
 		if (pt.x != -1) {
@@ -337,7 +345,7 @@ static const NWidgetPart _nested_terraform_widgets[] = {
 };
 
 static const WindowDesc _terraform_desc(
-	WDP_ALIGN_TBR, 22 + 36, 158, 36,
+	WDP_MANUAL, WDP_MANUAL, 158, 36,
 	WC_SCEN_LAND_GEN, WC_NONE,
 	WDF_CONSTRUCTION,
 	_nested_terraform_widgets, lengthof(_nested_terraform_widgets)
@@ -354,15 +362,14 @@ Window *ShowTerraformToolbar(Window *link)
 		w = FindWindowById(WC_SCEN_LAND_GEN, 0);
 		if (w == NULL) return NULL;
 	} else {
-		w->top = 22;
+		w->top -= w->height;
 		w->SetDirty();
 	}
 
 	/* Align the terraform toolbar under the main toolbar and put the linked
-	 * toolbar to left of it
-	 */
+	 * toolbar to left/right of it */
+	link->left = w->left + (_dynlang.text_dir == TD_RTL ? w->width : -link->width);
 	link->top  = w->top;
-	link->left = w->left - link->width;
 	link->SetDirty();
 
 	return w;
diff --git a/src/transparency_gui.cpp b/src/transparency_gui.cpp
index 1195c4f955..6233817c88 100644
--- a/src/transparency_gui.cpp
+++ b/src/transparency_gui.cpp
@@ -117,6 +117,13 @@ public:
 		}
 	}
 
+	virtual Point OnInitialPosition(const WindowDesc *desc, int16 sm_width, int16 sm_height, int window_number)
+	{
+		Point pt = GetToolbarAlignedWindowPosition(sm_width);
+		pt.y += 2 * (sm_height - this->GetWidget<NWidgetBase>(TTW_WIDGET_BUTTONS)->current_y);
+		return pt;
+	}
+
 	virtual void OnInvalidateData(int data)
 	{
 		for (uint i = TTW_WIDGET_BEGIN; i < TTW_WIDGET_END; i++) {
@@ -149,7 +156,7 @@ static const NWidgetPart _nested_transparency_widgets[] = {
 };
 
 static const WindowDesc _transparency_desc(
-	WDP_ALIGN_TBR, 94, 219, 49,
+	WDP_MANUAL, WDP_MANUAL, 219, 49,
 	WC_TRANSPARENCY_TOOLBAR, WC_NONE,
 	0,
 	_nested_transparency_widgets, lengthof(_nested_transparency_widgets)
diff --git a/src/window.cpp b/src/window.cpp
index a5a057cfcf..28f6fddf57 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -1051,6 +1051,20 @@ restart:
 	return pt;
 }
 
+/**
+ * Computer the position of the top-left corner of a window to be opened right
+ * under the toolbar.
+ * @param window_width the width of the window to get the position for
+ * @return Coordinate of the top-left corner of the new window.
+ */
+Point GetToolbarAlignedWindowPosition(int window_width)
+{
+	const Window *w = FindWindowById(WC_MAIN_TOOLBAR, 0);
+	assert(w != NULL);
+	Point pt = { _dynlang.text_dir == TD_RTL ? w->left : (w->left + w->width) - window_width, w->top + w->height };
+	return pt;
+}
+
 /**
  * Compute the position of the top-left corner of a new window that is opened.
  *
@@ -1071,7 +1085,7 @@ restart:
 static Point LocalGetWindowPlacement(const WindowDesc *desc, int16 sm_width, int16 sm_height, int window_number)
 {
 	Point pt;
-	Window *w;
+	const Window *w;
 
 	int16 default_width  = max(desc->default_width,  sm_width);
 	int16 default_height = max(desc->default_height, sm_height);
diff --git a/src/window_gui.h b/src/window_gui.h
index 01b49b23cd..5eb2bf4ef3 100644
--- a/src/window_gui.h
+++ b/src/window_gui.h
@@ -166,6 +166,8 @@ enum WindowDefaultPosition {
 	WDP_ALIGN_TBL = -4, ///< Align the left side of the window with the left side of the main toolbar
 };
 
+Point GetToolbarAlignedWindowPosition(int window_width);
+
 /**
  * Scrollbar data structure
  */