diff --git a/doc/classes/QskAspect.dox b/doc/classes/QskAspect.dox
index 3d1244a3..817c1a87 100644
--- a/doc/classes/QskAspect.dox
+++ b/doc/classes/QskAspect.dox
@@ -4,10 +4,10 @@
 
     \brief Lookup key for a QskSkinHintTable
 
-    Used by the \ref qskskinning "themeing system" to determine how a given aspect
-    of a control is drawn. While an aspect is simply a 64-bit unsigned integer, it
-    is composed of smaller enum bitfields which can be ORed together to
-    describe a more specific part of the user interface.
+    QskAspect is used by the \ref qskskinning "themeing system" to determine how
+    a given aspect of a control is drawn. While an aspect is simply a 64-bit
+	unsigned integer, it is composed of smaller enum bitfields which can be ORed
+	together to describe a more specific part of the user interface.
 
     For example, the border colors of a QskPushButton while pressed is
     defined by combining the State (QskAbstractButton::Pressed) with the
@@ -38,14 +38,12 @@
     \var QskAspect::Type QskAspect::Flag
 
     Flags are all sort of attributes that are no metrics or colors - f.e
-    an alignment. A reasonable subset of possible flags is offered as
-    QskAspect::FlagPrimitive
+    an alignment.
 
     \var QskAspect::Type QskAspect::Metric
 
     Metrics are related to geometries in most cases corresponding to pixel distances.
-    Examples are the margin/padding. A reasonable subset of possible metrics
-    is offered as QskAspect::MetricPrimitive.
+    Examples are margin/padding(s).
 
     \var QskAspect::Type QskAspect::Color
 
@@ -53,47 +51,79 @@
  */
 
 /*!
-    \enum QskAspect::FlagPrimitive
+    \enum QskAspect::Primitive
 
-    \var QskAspect::FlagPrimitive QskAspect::NoFlagPrimitive
-    \var QskAspect::FlagPrimitive QskAspect::Alignment
-    \var QskAspect::FlagPrimitive QskAspect::Direction
-    \var QskAspect::FlagPrimitive QskAspect::Style
-    \var QskAspect::FlagPrimitive QskAspect::Decoration
-    \var QskAspect::FlagPrimitive QskAspect::GraphicRole
-    \var QskAspect::FlagPrimitive QskAspect::FontRole
+    \sa setPrimitive(), clearPrimitive(), primitive(),
+        reservePrimitives(), primitiveCount()
 
-    \sa setPrimitive(), clearPrimitive(), primitive()
+    \var QskAspect::Primitive QskAspect::NoPrimitive
+		No specific primitive
+
+    \var QskAspect::Primitive QskAspect::Alignment
+		Usually used in combination with QskAspect::Flag
+
+	\sa QskSkinnable::alignmentHint(), QskSkinHintTableEditor::alignment()
+
+    \var QskAspect::Primitive QskAspect::Style
+        Usually used in combination with QskAspect::Flag
+
+    \var QskAspect::Primitive QskAspect::GraphicRole
+
+	\sa QskSkinnable::graphicRoleHint(), QskSkinHintTableEditor::graphicRole()
+
+    \var QskAspect::Primitive QskAspect::FontRole
+
+	\sa QskSkinnable::fontRoleHint(), QskSkinHintTableEditor::fontRole()
+
+    \var QskAspect::Primitive QskAspect::TextColor
+		bla
+
+    \var QskAspect::Primitive QskAspect::StyleColor
+		bla
+
+    \var QskAspect::Primitive QskAspect::LinkColor
+		bla
+
+    \var QskAspect::Primitive QskAspect::StrutSize
+		bla
+
+	\sa QskSkinnable::strutSizeHint(), QskSkinHintTableEditor::strutSize()
+
+    \var QskAspect::Primitive QskAspect::Size
+		bla
+
+    \var QskAspect::Primitive QskAspect::Position
+		bla
+
+    \var QskAspect::Primitive QskAspect::Margin
+		bla
+
+	\sa QskSkinnable::marginHint(), QskSkinHintTableEditor::margin()
+
+    \var QskAspect::Primitive QskAspect::Padding
+		bla
+
+	\sa QskSkinnable::paddingHint(), QskSkinHintTableEditor::padding()
+
+    \var QskAspect::Primitive QskAspect::Spacing
+		bla
+
+	\sa QskSkinnable::spacingHint(), QskSkinHintTableEditor::spacing()
+
+    \var QskAspect::Primitive QskAspect::Shadow
+		bla
+
+    \var QskAspect::Primitive QskAspect::Shape
+		bla
+
+	\sa QskSkinnable::boxShapeHint(), QskSkinHintTableEditor::boxShape()
+
+    \var QskAspect::Primitive QskAspect::Border
+		bla
+	\sa QskSkinnable::boxBorderMetricsHint(), QskSkinnable::boxBorderColorsHint()
+	    QskSkinHintTableEditor::boxBorderMetrics(), QskSkinHintTableEditor::boxBorderColors()
 */
 
-/*!
-    \enum QskAspect::MetricPrimitive
-
-    \var QskAspect::MetricPrimitive QskAspect::NoMetricPrimitive
-    \var QskAspect::MetricPrimitive QskAspect::StrutSize
-    \var QskAspect::MetricPrimitive QskAspect::Size
-    \var QskAspect::MetricPrimitive QskAspect::Position
-    \var QskAspect::MetricPrimitive QskAspect::Margin
-    \var QskAspect::MetricPrimitive QskAspect::Padding
-    \var QskAspect::MetricPrimitive QskAspect::Shadow
-    \var QskAspect::MetricPrimitive QskAspect::Spacing
-    \var QskAspect::MetricPrimitive QskAspect::Shape
-    \var QskAspect::MetricPrimitive QskAspect::Border
-
-    \sa setPrimitive(), clearPrimitive(), primitive()
-*/
-
-/*!
-    \enum QskAspect::ColorPrimitive
-
-    \var QskAspect::ColorPrimitive QskAspect::NoColorPrimitive
-    \var QskAspect::ColorPrimitive QskAspect::TextColor
-    \var QskAspect::ColorPrimitive QskAspect::StyleColor
-    \var QskAspect::ColorPrimitive QskAspect::LinkColor
-
-    \sa setPrimitive(), clearPrimitive(), primitive()
-*/
-    
 /*! 
     \enum QskAspect::Placement
 
@@ -275,19 +305,7 @@
 */
 
 /*!
-    \fn QskAspect::operator|( FlagPrimitive ) const
-
-    Sets the primitive bits
-*/
-
-/*!
-    \fn QskAspect::operator|( MetricPrimitive ) const
-
-    Sets the primitive bits
-*/
-
-/*!
-    \fn QskAspect::operator|( ColorPrimitive ) const
+    \fn QskAspect::operator|( Primitive ) const
 
     Sets the primitive bits
 */
diff --git a/skins/material/QskMaterialSkin.cpp b/skins/material/QskMaterialSkin.cpp
index 13706d25..c6b5c5db 100644
--- a/skins/material/QskMaterialSkin.cpp
+++ b/skins/material/QskMaterialSkin.cpp
@@ -673,7 +673,6 @@ void Editor::setupSubWindow()
 
     // Panel
 
-    setFlagHint( Q::Panel | A::Decoration, true );
     setPadding( Q::Panel, 10 );
     setBoxShape( Q::Panel, 0 );
     setBoxBorderMetrics( Q::Panel, 2 );
@@ -685,15 +684,18 @@ void Editor::setupSubWindow()
 
     setBoxBorderColors( Q::Panel, colors );
 
-    // TitleBar
-    setGradient( Q::TitleBar, m_pal.darker200 );
-    setGradient( Q::TitleBar | Q::Focused, m_pal.accentColor );
+    // TitleBarPanel
+    setFlagHint( Q::TitleBarPanel | QskAspect::Style,
+        Q::TitleBar | Q::Title | Q::Symbol );
+
+    setGradient( Q::TitleBarPanel, m_pal.darker200 );
+    setGradient( Q::TitleBarPanel | Q::Focused, m_pal.accentColor );
 
     // TitleBarText
     setFontRole( Q::TitleBarText, QskSkin::SmallFont );
     setAlignment( Q::TitleBarText, Qt::AlignLeft | Qt::AlignVCenter );
 
-    for ( auto subControl : { Q::Panel, Q::TitleBar, Q::TitleBarText } )
+    for ( auto subControl : { Q::Panel, Q::TitleBarPanel, Q::TitleBarText } )
         setAnimation( subControl | A::Color, qskDuration );
 
 }
diff --git a/skins/squiek/QskSquiekSkin.cpp b/skins/squiek/QskSquiekSkin.cpp
index 46578972..288c4956 100644
--- a/skins/squiek/QskSquiekSkin.cpp
+++ b/skins/squiek/QskSquiekSkin.cpp
@@ -816,7 +816,6 @@ void Editor::setupSubWindow()
 
     // Panel
 
-    setFlagHint( Q::Panel | A::Decoration, true );
     setPadding( Q::Panel, 10 );
     setBoxBorderMetrics( Q::Panel, 2 );
     setBoxShape( Q::Panel, radius, radius, 0, 0, Qt::AbsoluteSize );
@@ -828,13 +827,16 @@ void Editor::setupSubWindow()
     setBoxBorderColors( Q::Panel, borderColors );
     setGradient( Q::Panel, m_pal.lighter135 );
 
-    // TitleBar
+    // TitleBarPanel
 
-    setGradient( Q::TitleBar | Q::Focused, m_pal.highlighted );
-    setGradient( Q::TitleBar, m_pal.contrasted );
-    setSpacing( Q::TitleBar, 5 );
-    setStrutSize( Q::TitleBar, 0, 20 );
-    setBoxShape( Q::TitleBar, radius, radius, 0, 0, Qt::AbsoluteSize );
+    setFlagHint( Q::TitleBarPanel | QskAspect::Style,
+        Q::TitleBar | Q::Title | Q::Symbol );
+
+    setGradient( Q::TitleBarPanel | Q::Focused, m_pal.highlighted );
+    setGradient( Q::TitleBarPanel, m_pal.contrasted );
+    setSpacing( Q::TitleBarPanel, 5 );
+    setStrutSize( Q::TitleBarPanel, 0, 20 );
+    setBoxShape( Q::TitleBarPanel, radius, radius, 0, 0, Qt::AbsoluteSize );
 
     // TitleBarText
     setFontRole( Q::TitleBarText, QskSkin::SmallFont );
@@ -843,7 +845,7 @@ void Editor::setupSubWindow()
 
     setAlignment( Q::TitleBarText, Qt::AlignLeft | Qt::AlignVCenter );
 
-    for ( auto subControl : { Q::Panel, Q::TitleBar, Q::TitleBarText } )
+    for ( auto subControl : { Q::Panel, Q::TitleBarPanel, Q::TitleBarText } )
         setAnimation( subControl | A::Color, qskDuration );
 }
 
diff --git a/src/common/QskAspect.h b/src/common/QskAspect.h
index f8b7779f..45558cc6 100644
--- a/src/common/QskAspect.h
+++ b/src/common/QskAspect.h
@@ -33,9 +33,7 @@ class QSK_EXPORT QskAspect
         NoPrimitive = 0,
 
         Alignment,
-        Direction,
         Style,
-        Decoration,
         GraphicRole,
         FontRole,
 
diff --git a/src/controls/QskSubWindow.cpp b/src/controls/QskSubWindow.cpp
index a0ff84d6..a36dc85d 100644
--- a/src/controls/QskSubWindow.cpp
+++ b/src/controls/QskSubWindow.cpp
@@ -14,26 +14,27 @@
 #include <qurl.h>
 
 QSK_SUBCONTROL( QskSubWindow, Panel )
-QSK_SUBCONTROL( QskSubWindow, TitleBar )
+QSK_SUBCONTROL( QskSubWindow, TitleBarPanel )
 QSK_SUBCONTROL( QskSubWindow, TitleBarSymbol )
 QSK_SUBCONTROL( QskSubWindow, TitleBarText )
 
+namespace
+{
+    inline QskAspect aspectDecoration()
+    {
+        return QskSubWindow::TitleBarPanel | QskAspect::Flag | QskAspect::Style;
+    }
+}
+
 class QskSubWindow::PrivateData
 {
   public:
     PrivateData()
         : isWindowIconSourceDirty( false )
     {
-        // should be available from the platform somehow. TODO ...
-
-        windowButtons = QskSubWindow::WindowButtons( QskSubWindow::MinimizeButton |
-            QskSubWindow::MaximizeButton | QskSubWindow::CloseButton );
-
         windowTitleTextOptions.setElideMode( Qt::ElideRight );
     }
 
-    QskSubWindow::WindowButtons windowButtons;
-
     QString windowTitle;
     QskTextOptions windowTitleTextOptions;
 
@@ -57,24 +58,38 @@ QskSubWindow::~QskSubWindow()
 {
 }
 
-void QskSubWindow::setDecorated( bool on )
+void QskSubWindow::setDecorations( Decorations decorations )
 {
-    if ( on == isDecorated() )
-        return;
-
-    setFlagHint( Panel | QskAspect::Decoration, on );
-
-    resetImplicitSize(); // in case some parent wants to layout
-
-    polish();
-    update();
-
-    Q_EMIT decoratedChanged();
+    if ( setFlagHint( aspectDecoration(), decorations ) )
+        Q_EMIT decorationsChanged( decorations );
 }
 
-bool QskSubWindow::isDecorated() const
+QskSubWindow::Decorations QskSubWindow::decorations() const
 {
-    return flagHint< bool >( Panel | QskAspect::Decoration, true );
+    return flagHint< QskSubWindow::Decorations >( aspectDecoration() );
+}
+
+void QskSubWindow::setDecoration( Decoration decoration, bool on )
+{
+    auto d = decorations();
+
+    if ( on )
+        d |= decoration;
+    else
+        d &= ~decoration;
+
+    setDecorations( d );
+}
+
+void QskSubWindow::resetDecorations()
+{
+    if ( resetFlagHint( aspectDecoration() ) )
+        Q_EMIT decorationsChanged( decorations() );
+}
+
+bool QskSubWindow::hasDecoration( Decoration decoration ) const
+{
+    return decorations() & decoration;
 }
 
 void QskSubWindow::setWindowTitle( const QString& title )
@@ -166,44 +181,9 @@ bool QskSubWindow::hasWindowIcon() const
     return !( windowIcon().isEmpty() && windowIconSource().isEmpty() );
 }
 
-
-void QskSubWindow::setWindowButtons( WindowButtons buttons )
-{
-    if ( buttons != m_data->windowButtons )
-    {
-        m_data->windowButtons = buttons;
-        update();
-
-        Q_EMIT windowButtonsChanged();
-    }
-}
-
-QskSubWindow::WindowButtons QskSubWindow::windowButtons() const
-{
-    return m_data->windowButtons;
-}
-
-void QskSubWindow::setWindowButton( WindowButton button, bool on )
-{
-    if ( on == bool( button & m_data->windowButtons ) )
-        return;
-
-    if ( on )
-        m_data->windowButtons |= button;
-    else
-        m_data->windowButtons &= ~button;
-
-    Q_EMIT windowButtonsChanged();
-}
-
-bool QskSubWindow::testWindowButton( WindowButton button ) const
-{
-    return m_data->windowButtons & button;
-}
-
 QRectF QskSubWindow::titleBarRect() const
 {
-    return subControlRect( TitleBar );
+    return subControlRect( TitleBarPanel );
 }
 
 bool QskSubWindow::event( QEvent* event )
@@ -234,7 +214,7 @@ QRectF QskSubWindow::layoutRectForSize( const QSizeF& size ) const
 {
     QRectF rect;
     rect.setSize( size );
-    rect.setTop( subControlRect( size, TitleBar ).bottom() );
+    rect.setTop( subControlRect( size, TitleBarPanel ).bottom() );
 
     return innerBox( Panel, rect );
 }
diff --git a/src/controls/QskSubWindow.h b/src/controls/QskSubWindow.h
index 552e33c9..aa8d5243 100644
--- a/src/controls/QskSubWindow.h
+++ b/src/controls/QskSubWindow.h
@@ -16,8 +16,8 @@ class QSK_EXPORT QskSubWindow : public QskPopup
 {
     Q_OBJECT
 
-    Q_PROPERTY( bool decorated READ isDecorated
-        WRITE setDecorated NOTIFY decoratedChanged )
+    Q_PROPERTY( Decorations decorations READ decorations
+        WRITE setDecorations RESET resetDecorations NOTIFY decorationsChanged )
 
     Q_PROPERTY( QString windowTitle READ windowTitle
         WRITE setWindowTitle NOTIFY windowTitleChanged )
@@ -31,29 +31,39 @@ class QSK_EXPORT QskSubWindow : public QskPopup
     Q_PROPERTY( QskGraphic windowIcon READ windowIcon
         WRITE setWindowIcon NOTIFY windowIconChanged FINAL )
 
-    Q_PROPERTY( WindowButtons windowButtons READ windowButtons
-        WRITE setWindowButtons NOTIFY windowButtonsChanged )
-
     using Inherited = QskPopup;
 
   public:
-    enum WindowButton
+    enum Decoration
     {
-        MinimizeButton = 0x1,
-        MaximizeButton = 0x2,
-        CloseButton = 0x4
+        NoDecoration   = 0,
+
+        TitleBar       = 1 << 0,
+
+        Title          = 1 << 1,
+        Symbol         = 1 << 2
+
+#if 0
+        MinimizeButton = 1 << 3,
+        MaximizeButton = 1 << 4,
+        CloseButton    = 1 << 5
+#endif
     };
 
-    Q_ENUM( WindowButton )
-    Q_DECLARE_FLAGS( WindowButtons, WindowButton )
+    Q_ENUM( Decoration )
+    Q_DECLARE_FLAGS( Decorations, Decoration )
 
-    QSK_SUBCONTROLS( Panel, TitleBar, TitleBarSymbol, TitleBarText )
+    QSK_SUBCONTROLS( Panel, TitleBarPanel, TitleBarSymbol, TitleBarText )
 
     QskSubWindow( QQuickItem* parent = nullptr );
     ~QskSubWindow() override;
 
-    void setDecorated( bool );
-    bool isDecorated() const;
+    void setDecorations( Decorations );
+    void resetDecorations();
+    Decorations decorations() const;
+
+    void setDecoration( Decoration, bool on = true );
+    bool hasDecoration( Decoration ) const;
 
     void setWindowTitleTextOptions( const QskTextOptions& );
     QskTextOptions windowTitleTextOptions() const;
@@ -70,23 +80,16 @@ class QSK_EXPORT QskSubWindow : public QskPopup
 
     bool hasWindowIcon() const;
 
-    void setWindowButtons( WindowButtons );
-    WindowButtons windowButtons() const;
-
-    void setWindowButton( WindowButton, bool on = true );
-    bool testWindowButton( WindowButton ) const;
-
     QRectF titleBarRect() const;
 
     QRectF layoutRectForSize( const QSizeF& ) const override;
 
   Q_SIGNALS:
-    void decoratedChanged();
+    void decorationsChanged( Decorations );
     void windowTitleChanged();
     void windowTitleTextOptionsChanged();
     void windowIconChanged();
     void windowIconSourceChanged();
-    void windowButtonsChanged();
 
   protected:
     bool event( QEvent* ) override;
diff --git a/src/controls/QskSubWindowSkinlet.cpp b/src/controls/QskSubWindowSkinlet.cpp
index c51e5c7d..9ad56f07 100644
--- a/src/controls/QskSubWindowSkinlet.cpp
+++ b/src/controls/QskSubWindowSkinlet.cpp
@@ -30,7 +30,7 @@ QRectF QskSubWindowSkinlet::subControlRect( const QskSkinnable* skinnable,
     {
         return contentsRect;
     }
-    else if ( subControl == QskSubWindow::TitleBar )
+    else if ( subControl == QskSubWindow::TitleBarPanel )
     {
         return titleBarRect( subWindow, contentsRect );
     }
@@ -49,37 +49,45 @@ QRectF QskSubWindowSkinlet::subControlRect( const QskSkinnable* skinnable,
 QSGNode* QskSubWindowSkinlet::updateSubNode(
     const QskSkinnable* skinnable, quint8 nodeRole, QSGNode* node ) const
 {
+    using Q = QskSubWindow;
+
     const auto subWindow = static_cast< const QskSubWindow* >( skinnable );
 
     switch ( nodeRole )
     {
         case PanelRole:
         {
-            return updateBoxNode( subWindow, node, QskSubWindow::Panel );
+            return updateBoxNode( subWindow, node, Q::Panel );
         }
         case TitleBarRole:
         {
-            if ( subWindow->isDecorated() )
-                return updateBoxNode( subWindow, node, QskSubWindow::TitleBar );
+            const auto decorations = subWindow->decorations();
+
+            if ( decorations & Q::TitleBar )
+                return updateBoxNode( subWindow, node, Q::TitleBarPanel );
 
             return nullptr;
         }
         case SymbolRole:
         {
-            if ( subWindow->isDecorated() )
+            const auto decorations = subWindow->decorations();
+
+            if ( ( decorations & Q::TitleBar ) && ( decorations & Q::Symbol ) )
             {
                 return updateGraphicNode( subWindow, node,
-                    subWindow->windowIcon(), QskSubWindow::TitleBarSymbol );
+                    subWindow->windowIcon(), Q::TitleBarSymbol );
             }
 
             return nullptr;
         }
         case TitleRole:
         {
-            if ( subWindow->isDecorated() )
+            const auto decorations = subWindow->decorations();
+
+            if ( ( decorations & Q::TitleBar ) && ( decorations & Q::Title ) )
             {
                 return updateTextNode( subWindow, node, subWindow->windowTitle(),
-                    subWindow->windowTitleTextOptions(), QskSubWindow::TitleBarText );
+                    subWindow->windowTitleTextOptions(), Q::TitleBarText );
             }
 
             return nullptr;
@@ -104,16 +112,23 @@ qreal QskSubWindowSkinlet::titleBarHeight( const QskSubWindow* subWindow ) const
 {
     using Q = QskSubWindow;
 
-    if ( !subWindow->isDecorated() )
+    const auto decorations = subWindow->decorations();
+    if ( !( decorations & Q::TitleBar ) )
         return 0;
 
-    const auto margins = subWindow->paddingHint( Q::TitleBar );
-    const QFontMetricsF fm( subWindow->effectiveFont( Q::TitleBarText ) );
+    auto height = subWindow->strutSizeHint( Q::TitleBarPanel ).height();
 
-    const qreal height = fm.height() + margins.top() + margins.bottom();
-    const auto strutSize = subWindow->strutSizeHint( Q::TitleBar );
+    if ( decorations & Q::Title )
+    {
+        const auto padding = subWindow->paddingHint( Q::TitleBarPanel );
+        const QFontMetricsF fm( subWindow->effectiveFont( Q::TitleBarText ) );
 
-    return qMax( height, strutSize.height() );
+        const qreal h = fm.height() + padding.top() + padding.bottom();
+        if ( h > height )
+            height = h;
+    }
+
+    return height;
 }
 
 QRectF QskSubWindowSkinlet::symbolRect(
@@ -121,13 +136,16 @@ QRectF QskSubWindowSkinlet::symbolRect(
 {
     using Q = QskSubWindow;
 
-    auto rect = subWindow->subControlContentsRect( contentsRect, Q::TitleBar );
+    if ( !subWindow->hasDecoration( Q::Symbol ) )
+        return QRectF();
 
-    int w = 0;
+    auto rect = subWindow->subControlContentsRect( contentsRect, Q::TitleBarPanel );
 
     if ( !rect.isEmpty() )
     {
         const auto symbol = subWindow->windowIcon();
+
+        int w = 0;
         if ( !symbol.isNull() )
             w = symbol.widthForHeight( rect.height() );
 
@@ -142,14 +160,19 @@ QRectF QskSubWindowSkinlet::titleRect(
 {
     using Q = QskSubWindow;
 
-    auto rect = subWindow->subControlContentsRect( contentsRect, Q::TitleBar );
+    if ( !subWindow->hasDecoration( Q::Title ) )
+        return QRectF();
+
+    auto rect = subWindow->subControlContentsRect( contentsRect, Q::TitleBarPanel );
 
     if ( !rect.isEmpty() )
     {
-        const auto spacing = subWindow->spacingHint( Q::TitleBar );
         const auto symbolRect = subControlRect( subWindow, rect, Q::TitleBarSymbol );
-
-        rect.setX( rect.x() + symbolRect.right() + spacing );
+        if ( !symbolRect.isEmpty() )
+        {
+            const auto spacing = subWindow->spacingHint( Q::TitleBarPanel );
+            rect.setX( symbolRect.right() + spacing );
+        }
 
 #if 0
         const QFontMetricsF fm( subWindow->effectiveFont( Q::TitleBarText ) );