diff --git a/src/data/action/set.cpp b/src/data/action/set.cpp
index af68a0a0..0da4564c 100644
--- a/src/data/action/set.cpp
+++ b/src/data/action/set.cpp
@@ -80,6 +80,14 @@ void ReorderCardsAction::perform(bool to_undo) {
 
 // ----------------------------------------------------------------------------- : Change stylesheet
 
+String DisplayChangeAction::getName(bool to_undo) const {
+	assert(false);
+	return _("");
+}
+void DisplayChangeAction::perform(bool to_undo) {
+	assert(false);
+}
+
 
 String ChangeCardStyleAction::getName(bool to_undo) const {
 	return _("Change style");
@@ -88,6 +96,7 @@ void ChangeCardStyleAction::perform(bool to_undo) {
 	swap(card->stylesheet, stylesheet);
 }
 
+
 String ChangeSetStyleAction::getName(bool to_undo) const {
 	return _("Change style (all cards)");
 }
diff --git a/src/data/action/set.hpp b/src/data/action/set.hpp
index 6b678135..73ec61d4 100644
--- a/src/data/action/set.hpp
+++ b/src/data/action/set.hpp
@@ -76,8 +76,15 @@ class ReorderCardsAction : public CardListAction {
 
 // ----------------------------------------------------------------------------- : Change stylesheet
 
+/// An action that affects the rendering/display/look of a set or cards in the set
+class DisplayChangeAction : public Action {
+  public:
+	virtual String getName(bool to_undo) const;
+	virtual void   perform(bool to_undo);
+};
+
 /// Changing the style of a a card
-class ChangeCardStyleAction : public Action {
+class ChangeCardStyleAction : public DisplayChangeAction {
   public:
 	ChangeCardStyleAction(const CardP& card, const StyleSheetP& stylesheet)
 		: card(card), stylesheet(stylesheet) {}
@@ -91,7 +98,7 @@ class ChangeCardStyleAction : public Action {
 };
 
 /// Changing the style of a set to that of a card
-class ChangeSetStyleAction : public Action {
+class ChangeSetStyleAction : public DisplayChangeAction {
   public:
 	ChangeSetStyleAction(Set& set, const CardP& card)
 		: set(set), card(card) {}
diff --git a/src/data/format/image.cpp b/src/data/format/image.cpp
index cf980799..0132e4bd 100644
--- a/src/data/format/image.cpp
+++ b/src/data/format/image.cpp
@@ -32,7 +32,7 @@ Bitmap export_bitmap(const SetP& set, const CardP& card) {
 //		viewer.rotation.angle = 0;
 //		viewer.rotation.zoom  = 1.0;
 	}
-	RealSize size = viewer.getRotation().getExternalRect().size();
+	RealSize size = viewer.getRotation().getExternalSize();
 	// create bitmap & dc
 	Bitmap bitmap(size.width, size.height);
 	if (!bitmap.Ok()) throw InternalError(_("Unable to create bitmap"));
diff --git a/src/gui/control/card_viewer.cpp b/src/gui/control/card_viewer.cpp
index 2331ae2b..c1d88f70 100644
--- a/src/gui/control/card_viewer.cpp
+++ b/src/gui/control/card_viewer.cpp
@@ -20,10 +20,7 @@ CardViewer::CardViewer(Window* parent, int id, long style)
 wxSize CardViewer::DoGetBestSize() const {
 	wxSize ws = GetSize(), cs = GetClientSize();
 	if (set) {
-		StyleSheetP stylesheet = set->stylesheetFor(card);
-		if (stylesheet) {
-			return wxSize(stylesheet->card_width, stylesheet->card_height) + ws - cs;
-		}
+		return (wxSize)getRotation().getExternalSize() + ws - cs;
 	}
 	return cs;
 }
diff --git a/src/gui/control/native_look_editor.cpp b/src/gui/control/native_look_editor.cpp
index 9eac6d61..e2c1ab1a 100644
--- a/src/gui/control/native_look_editor.cpp
+++ b/src/gui/control/native_look_editor.cpp
@@ -91,7 +91,7 @@ SetInfoEditor::SetInfoEditor(Window* parent, int id, long style)
 {}
 
 void SetInfoEditor::onChangeSet() {
-	setStyles(set->stylesheet->set_info_style);
+	setStyles(set->stylesheet, set->stylesheet->set_info_style);
 	setData(set->data);
 }
 
@@ -103,7 +103,7 @@ StylingEditor::StylingEditor(Window* parent, int id, long style)
 
 void StylingEditor::showStylesheet(const StyleSheetP& stylesheet) {
 	this->stylesheet = stylesheet;
-	setStyles(stylesheet->styling_style);
+	setStyles(set->stylesheet, stylesheet->styling_style);
 	setData(set->stylingDataFor(*stylesheet));
 }
 
diff --git a/src/gui/control/text_ctrl.cpp b/src/gui/control/text_ctrl.cpp
index da60410c..9e15f740 100644
--- a/src/gui/control/text_ctrl.cpp
+++ b/src/gui/control/text_ctrl.cpp
@@ -56,7 +56,7 @@ void TextCtrl::setValue(String* value) {
 		// assign to this control
 		IndexMap<FieldP,StyleP> styles; styles.add(field, style);
 		IndexMap<FieldP,ValueP> values; values.add(field, value);
-		setStyles(styles);
+		setStyles(set->stylesheet, styles);
 		setData(values);
 		// determine required height
 		viewers.front()->getEditor()->determineSize();
diff --git a/src/gui/set/cards_panel.cpp b/src/gui/set/cards_panel.cpp
index 37069ca7..6fb7f884 100644
--- a/src/gui/set/cards_panel.cpp
+++ b/src/gui/set/cards_panel.cpp
@@ -175,7 +175,7 @@ void CardsPanel::onCommand(int id) {
 				: id == ID_CARD_ROTATE_180 ? 180
 				:                            270
 			);
-			//onRenderSettingsChange();
+			set->actions.tellListeners(DisplayChangeAction(),true);
 			break;
 		}
 		case ID_SELECT_COLUMNS: {
@@ -196,8 +196,13 @@ bool CardsPanel::wantsToHandle(const Action&, bool undone) const {
 	return false;
 }
 
-void CardsPanel::onAction(const Action& action, bool undo) {
-	// TODO
+void CardsPanel::onAction(const Action& action, bool undone) {
+	TYPE_CASE_(action, DisplayChangeAction) {
+		// The style changed, maybe also the size of editor
+		Layout();
+		//if (current_panel) current_panel->Layout();
+		//fixMinWindowSize();
+	}
 }
 
 void CardsPanel::onRenderSettingsChange() {
@@ -224,4 +229,5 @@ void CardsPanel::selectCard(const CardP& card) {
 	card_list->setCard(card);
 	editor->setCard(card);
 	notes->setValue(card ? &card->notes : nullptr);
+	Layout();
 }
diff --git a/src/gui/set/style_panel.cpp b/src/gui/set/style_panel.cpp
index e095c5ee..59c7fc54 100644
--- a/src/gui/set/style_panel.cpp
+++ b/src/gui/set/style_panel.cpp
@@ -83,11 +83,13 @@ void StylePanel::onStyleSelect(wxCommandEvent&) {
 			stylesheet = StyleSheetP();
 		}
 		set->actions.add(new ChangeCardStyleAction(card, stylesheet));
+		Layout();
 	}
 }
 
 void StylePanel::onUseForAll(wxCommandEvent&) {
 	set->actions.add(new ChangeSetStyleAction(*set, card));
+	Layout();
 }
 
 BEGIN_EVENT_TABLE(StylePanel, wxPanel)
diff --git a/src/gui/set/window.cpp b/src/gui/set/window.cpp
index c52d08c1..0b89963b 100644
--- a/src/gui/set/window.cpp
+++ b/src/gui/set/window.cpp
@@ -27,6 +27,7 @@
 #include <data/card.hpp>
 #include <data/settings.hpp>
 #include <data/format/formats.hpp>
+#include <data/action/set.hpp>
 
 DECLARE_TYPEOF_COLLECTION(SetWindowPanel*);
 DECLARE_TYPEOF_COLLECTION(SetWindow*);
@@ -231,11 +232,11 @@ void SetWindow::onChangeSet() {
 }
 
 void SetWindow::onAction(const Action& action, bool undone) {
-//	TYPE_CASE_(action, SetStyleChange) {
-//		// The style changed, maybe also the size of the viewer
-//		Layout();
-//		fixMinWindowSize();
-//	}
+	TYPE_CASE_(action, DisplayChangeAction) {
+		// The style changed, maybe also the size of card viewers
+		if (current_panel) current_panel->Layout();
+		fixMinWindowSize();
+	}
 }
 	
 	
@@ -517,13 +518,10 @@ void SetWindow::onReplaceAll(wxFindDialogEvent&) {
 
 void SetWindow::onEditPreferences(wxCommandEvent&) {
 	PreferencesWindow wnd(this);
-	wnd.ShowModal();
-//	if (wnd.ShowModal() == wxID_OK) {
-//		// render settings may have changed, notify all windows
-//		FOR_EACH(m, setWindows) {
-//			m->onRenderSettingsChange();
-//		}
-//	}
+	if (wnd.ShowModal() == wxID_OK) {
+		// render settings may have changed, notify all windows
+		set->actions.tellListeners(DisplayChangeAction(),true);
+	}
 }
 
 
diff --git a/src/render/card/viewer.cpp b/src/render/card/viewer.cpp
index 2965c2e0..d8ecf656 100644
--- a/src/render/card/viewer.cpp
+++ b/src/render/card/viewer.cpp
@@ -14,6 +14,8 @@
 #include <data/field.hpp>
 #include <data/settings.hpp>
 #include <data/action/value.hpp>
+#include <data/action/set.hpp>
+#include <gui/util.hpp> // clearDC
 
 DECLARE_TYPEOF_COLLECTION(ValueViewerP);
 typedef IndexMap<FieldP,StyleP> IndexMap_FieldP_StyleP;
@@ -25,17 +27,14 @@ DECLARE_TYPEOF_NO_REV(IndexMap_FieldP_StyleP);
 // ----------------------------------------------------------------------------- : Drawing
 
 void DataViewer::draw(DC& dc) {
-	StyleSheetP stylesheet = set->stylesheetFor(card);
 	StyleSheetSettings& ss = settings.stylesheetSettingsFor(*stylesheet);
-	RotatedDC rdc(dc, ss.card_angle(), stylesheet->getCardRect(), ss.card_zoom(), ss.card_anti_alias() && !nativeLook());
-	draw(rdc, set->stylesheet->card_background);
+	RotatedDC rdc(dc, ss.card_angle(), stylesheet->getCardRect(), ss.card_zoom(), ss.card_anti_alias() && !nativeLook(), true);
+	draw(rdc, stylesheet->card_background);
 }
 void DataViewer::draw(RotatedDC& dc, const Color& background) {
-	if (!set)  return; // no set specified, don't draw anything
+	if (!set) return; // no set specified, don't draw anything
 	// fill with background color
-	dc.SetPen(*wxTRANSPARENT_PEN);
-	dc.SetBrush(background);
-	dc.DrawRectangle(dc.getInternalRect());
+	clearDC(dc.getDC(), background);
 	// update style scripts
 	if (card) set->updateFor(card);
 	// draw values
@@ -59,9 +58,8 @@ ValueViewer* DataViewer::focusedViewer() const { return nullptr; }
 Context& DataViewer::getContext()  const { return set->getContext(); }
 
 Rotation DataViewer::getRotation() const {
-	StyleSheetP stylesheet = set->stylesheetFor(card);
 	StyleSheetSettings& ss = settings.stylesheetSettingsFor(*stylesheet);
-	return Rotation(ss.card_angle(), stylesheet->getCardRect(), ss.card_zoom());
+	return Rotation(ss.card_angle(), stylesheet->getCardRect(), ss.card_zoom(), true);
 }
 
 // ----------------------------------------------------------------------------- : Setting data
@@ -70,7 +68,8 @@ void DataViewer::setCard(const CardP& card) {
 	if (!card) return; // TODO: clear editor?
 	assert(set);
 	this->card = card;
-	setStyles(set->stylesheet->card_style);
+	stylesheet = set->stylesheetFor(card);
+	setStyles(stylesheet, stylesheet->card_style);
 	setData(card->data);
 }
 
@@ -82,11 +81,12 @@ struct CompareViewer {
 	}
 };
 
-void DataViewer::setStyles(IndexMap<FieldP,StyleP>& styles) {
+void DataViewer::setStyles(const StyleSheetP& stylesheet, IndexMap<FieldP,StyleP>& styles) {
 	if (!viewers.empty() && styles.contains(viewers.front()->getStyle())) {
 		// already using these styles
 		return;
 	}
+	this->stylesheet = stylesheet;
 	// create viewers
 	viewers.clear();
 	FOR_EACH(s, styles) {
@@ -117,6 +117,11 @@ ValueViewerP DataViewer::makeViewer(const StyleP& style) {
 }
 
 void DataViewer::onAction(const Action& action, bool undone) {
+	TYPE_CASE_(action, DisplayChangeAction) {
+		// refresh
+		setCard(card);
+		return;
+	}
 	TYPE_CASE(action, ValueAction) {
 		FOR_EACH(v, viewers) {
 			if (v->getValue() == action.valueP) {
diff --git a/src/render/card/viewer.hpp b/src/render/card/viewer.hpp
index 31aafe48..c9bfd6a9 100644
--- a/src/render/card/viewer.hpp
+++ b/src/render/card/viewer.hpp
@@ -21,10 +21,7 @@ class Context;
 
 /// A viewer can generate an image of some values, usually a card.
 class DataViewer : public SetView {
-  public:
-	/// Rotation and zoom to use when drawing
-//	Rotation rotation;
-	
+  public:	
 	// --------------------------------------------------- : Drawing
 	
 	/// Draw the current (card/data) to the given dc
@@ -63,7 +60,7 @@ class DataViewer : public SetView {
 	// --------------------------------------------------- : The viewers
   protected:
 	/// Set the styles for the data to be shown, recreating the viewers
-	void setStyles(IndexMap<FieldP,StyleP>& styles);
+	void setStyles(const StyleSheetP& stylesheet, IndexMap<FieldP,StyleP>& styles);
 	/// Set the data to be shown in the viewers, refresh them
 	void setData(IndexMap<FieldP,ValueP>& values);
 	
@@ -82,6 +79,8 @@ class DataViewer : public SetView {
 	
 	vector<ValueViewerP> viewers;	///< The viewers for the different values in the data
 	CardP card;						///< The card that is currently displayed, if any
+  public:
+	StyleSheetP stylesheet;			///< Stylesheet being used
 };
 
 // ----------------------------------------------------------------------------- : EOF
diff --git a/src/render/value/choice.cpp b/src/render/value/choice.cpp
index a742475c..26202173 100644
--- a/src/render/value/choice.cpp
+++ b/src/render/value/choice.cpp
@@ -23,12 +23,12 @@ void ChoiceValueViewer::draw(RotatedDC& dc) {
 			ScriptableImage& img = it->second;
 			ScriptImageP i;
 			if (nativeLook()) {
-				i = img.update(viewer.getContext(), *getSet().stylesheet, 16, 16, ASPECT_BORDER, false);
+				i = img.update(viewer.getContext(), *viewer.stylesheet, 16, 16, ASPECT_BORDER, false);
 			} else if(style().render_style & RENDER_TEXT) {
 				// also drawing text
-				i = img.update(viewer.getContext(), *getSet().stylesheet, 0, 0);
+				i = img.update(viewer.getContext(), *viewer.stylesheet, 0, 0);
 			} else {
-				i = img.update(viewer.getContext(), *getSet().stylesheet,
+				i = img.update(viewer.getContext(), *viewer.stylesheet,
 						dc.trS(style().width), dc.trS(style().height),
 						style().alignment == ALIGN_STRETCH ? ASPECT_STRETCH : ASPECT_FIT
 					);
diff --git a/src/util/rotation.cpp b/src/util/rotation.cpp
index 291d0a96..ffd7e32a 100644
--- a/src/util/rotation.cpp
+++ b/src/util/rotation.cpp
@@ -17,12 +17,15 @@ int constrain_angle(int angle) {
 	return (a / 90) * 90; // multiple of 90
 }
 
-Rotation::Rotation(int angle, const RealRect& rect, double zoom)
+Rotation::Rotation(int angle, const RealRect& rect, double zoom, bool is_internal)
 	: angle(constrain_angle(angle))
 	, size(rect.size())
 	, origin(rect.position())
 	, zoom(zoom)
 {
+	if (is_internal) {
+		size = trNoNeg(size);
+	}
 	// set origin
 	if (revX()) origin.x += size.width;
 	if (revY()) origin.y += size.height;
@@ -108,12 +111,12 @@ Rotater::~Rotater() {
 
 // ----------------------------------------------------------------------------- : RotatedDC
 
-RotatedDC::RotatedDC(DC& dc, int angle, const RealRect& rect, double zoom, bool high_quality)
-	: Rotation(angle, rect, zoom)
+RotatedDC::RotatedDC(DC& dc, int angle, const RealRect& rect, double zoom, bool high_quality, bool is_internal)
+	: Rotation(angle, rect, zoom, is_internal)
 	, dc(dc), high_quality(high_quality)
 {}
 
-RotatedDC::RotatedDC(DC& dc, const Rotation& rotation, bool high_quality = false)
+RotatedDC::RotatedDC(DC& dc, const Rotation& rotation, bool high_quality)
 	: Rotation(rotation)
 	, dc(dc), high_quality(high_quality&&false)
 {}
diff --git a/src/util/rotation.hpp b/src/util/rotation.hpp
index feb93e69..7c4e29f1 100644
--- a/src/util/rotation.hpp
+++ b/src/util/rotation.hpp
@@ -22,9 +22,11 @@
  */
 class Rotation {
   public:
-	/// Construct a rotation object with the given rectangle of external coordinates
-	/// and a given rotation angle and zoom factor
-	Rotation(int angle, const RealRect& rect, double zoom = 1.0);
+	/// Construct a rotation object
+	/** with the given rectangle of external coordinates and a given rotation angle and zoom factor.
+	 *  if is_internal then the rect gives the internal coordinates, its origin should be (0,0)
+	 */
+	Rotation(int angle, const RealRect& rect, double zoom = 1.0, bool is_internal = false);
 	
 	/// Change the zoom factor
 	inline void setZoom(double z) { zoom = z; }
@@ -34,6 +36,8 @@ class Rotation {
 	inline RealSize getInternalSize() const { return trInvNoNeg(size); }
 	/// The intarnal rectangle (origin at (0,0))
 	inline RealRect getInternalRect() const { return RealRect(RealPoint(0,0), getInternalSize()); }
+	/// The size of the external rectangle (as passed to the constructor) == trNoNeg(getInternalSize())
+	inline RealSize getExternalSize() const { return size; }
 	/// The external rectangle (as passed to the constructor) == trNoNeg(getInternalRect())
 	RealRect getExternalRect() const;
 	
@@ -120,7 +124,7 @@ class Rotater {
  */
 class RotatedDC : public Rotation {
   public:
-	RotatedDC(DC& dc, int angle, const RealRect& rect, double zoom, bool high_quality);
+	RotatedDC(DC& dc, int angle, const RealRect& rect, double zoom, bool high_quality, bool is_internal = false);
 	RotatedDC(DC& dc, const Rotation& rotation, bool high_quality);
   
 	// --------------------------------------------------- : Drawing