diff --git a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/Rack/RackPresenter.cpp b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/Rack/RackPresenter.cpp
index aa7b9d570d..7156fd1541 100644
--- a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/Rack/RackPresenter.cpp
+++ b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/Rack/RackPresenter.cpp
@@ -13,6 +13,8 @@
 #include <iscore/widgets/GraphicsItem.hpp>
 #include <QGraphicsScene>
 
+static const constexpr int slotSpacing = 0;
+
 RackPresenter::RackPresenter(const RackModel& model,
                            RackView* view,
                            QObject* parent):
@@ -56,7 +58,7 @@ qreal RackPresenter::height() const
 
     for(const auto& slot : slotmodels)
     {
-        totalHeight += slot.height() + 5.;
+        totalHeight += slot.height() + slotSpacing;
     }
 
     return totalHeight;
@@ -161,7 +163,7 @@ void RackPresenter::updateShape()
         auto& slotPres = slotmodels.at(slotId);
         slotPres.setWidth(width());
         slotPres.setVerticalPosition(currentSlotY);
-        currentSlotY += slotPres.height() + 5; // Separation between slots
+        currentSlotY += slotPres.height() + slotSpacing; // Separation between slots
     }
 
     // Horizontal shape
diff --git a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintHeader.hpp b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintHeader.hpp
index ed9948ea51..ca099aac70 100644
--- a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintHeader.hpp
+++ b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintHeader.hpp
@@ -6,6 +6,12 @@ class ConstraintView;
 class ConstraintHeader : public QGraphicsObject
 {
     public:
+        enum class State {
+            Hidden, // No rack, we show nothing
+            RackHidden, // There is at least a hidden rack in the constraint
+            RackShown // There is a rack currently shown
+        };
+
         using QGraphicsObject::QGraphicsObject;
         static constexpr int headerHeight() { return 25; }
         static const QFont font;
@@ -13,7 +19,22 @@ class ConstraintHeader : public QGraphicsObject
         void setWidth(double width);
         void setText(const QString &text);
 
+        void setState(State s)
+        {
+            if(s == m_state)
+                return;
+
+            if(m_state == State::Hidden)
+                show();
+            else if(s == State::Hidden)
+                hide();
+
+            m_state = s;
+            update();
+        }
+
     protected:
+        State m_state{};
         double m_width{};
         QString m_text;
 };
diff --git a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintPresenter.cpp b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintPresenter.cpp
index ffff2dcccf..92fb77c315 100644
--- a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintPresenter.cpp
+++ b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/ConstraintPresenter.cpp
@@ -146,7 +146,7 @@ void ConstraintPresenter::updateHeight()
 {
     if(m_viewModel.isRackShown())
     {
-        m_view->setHeight(rack()->height() + 60);
+        m_view->setHeight(rack()->height() + 50);
     }
     // TODO else if(rack but not shown)
     else
@@ -195,7 +195,7 @@ void ConstraintPresenter::on_rackShown(const Id<RackModel>& rackId)
     clearRackPresenter();
     createRackPresenter(m_viewModel.model().racks.at(rackId));
 
-    m_header->show();
+    m_header->setState(ConstraintHeader::State::RackShown);
     updateHeight();
 }
 
@@ -203,6 +203,7 @@ void ConstraintPresenter::on_rackHidden()
 {
     clearRackPresenter();
 
+    m_header->setState(ConstraintHeader::State::RackHidden);
     updateHeight();
 }
 
@@ -211,6 +212,7 @@ void ConstraintPresenter::on_rackRemoved()
     m_header->hide();
     clearRackPresenter();
 
+    m_header->setState(ConstraintHeader::State::Hidden);
     updateHeight();
 }
 
diff --git a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintHeader.cpp b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintHeader.cpp
index 3ae56425f3..a8d204bd53 100644
--- a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintHeader.cpp
+++ b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintHeader.cpp
@@ -3,6 +3,7 @@
 #include <QPainter>
 #include <QGraphicsView>
 #include <QGraphicsScene>
+#include <QApplication>
 QRectF TemporalConstraintHeader::boundingRect() const
 {
     return {0, 0, m_width, ConstraintHeader::headerHeight()};
@@ -10,9 +11,22 @@ QRectF TemporalConstraintHeader::boundingRect() const
 
 void TemporalConstraintHeader::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
 {
-    painter->setPen(Qt::white);
+    if(m_state == State::RackHidden)
+    {
+        auto rect = boundingRect();
+        painter->fillRect(rect, QColor::fromRgba(qRgba(0, 127, 229, 76)));
+
+        // Fake timenode continuation
+        auto color = qApp->palette("ScenarioPalette").base().color();
+        QPen pen{color, 2, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin};
+        painter->setPen(pen);
+        painter->drawLine(rect.topLeft(), rect.bottomLeft());
+        painter->drawLine(rect.topRight(), rect.bottomRight());
+        painter->drawLine(rect.bottomLeft(), rect.bottomRight());
+    }
     // Header
     painter->setFont(font);
+    painter->setPen(Qt::white);
 
     QFontMetrics fm(font);
     int textWidth = fm.width(m_text);
@@ -46,4 +60,9 @@ void TemporalConstraintHeader::paint(QPainter *painter, const QStyleOptionGraphi
     double w = m_width - x;
     double h = ConstraintHeader::headerHeight();
     painter->drawText(x,y,w,h, Qt::AlignLeft, m_text);
+
+    if(m_width > 20)
+        painter->drawLine(
+                    boundingRect().bottomLeft() + QPointF{10, -5},
+                    boundingRect().bottomRight() + QPointF{-10, -5});
 }
diff --git a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintView.cpp b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintView.cpp
index a643f8a6e2..905d485b3b 100644
--- a/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintView.cpp
+++ b/base/plugins/iscore-plugin-scenario/source/Document/Constraint/ViewModels/Temporal/TemporalConstraintView.cpp
@@ -39,7 +39,7 @@ void TemporalConstraintView::paint(
     int max_w = static_cast<int>(maxWidth());
     int def_w = static_cast<int>(defaultWidth());
 
-    // Draw the stuff present if there is a rack
+    // Draw the stuff present if there is a rack *in the model* ?
     if(presenter().rack())
     {
         // Background