diff --git a/gui/include/Common/VisualizationDef.h b/gui/include/Common/VisualizationDef.h
new file mode 100644
index 0000000..34f87f4
--- /dev/null
+++ b/gui/include/Common/VisualizationDef.h
@@ -0,0 +1,7 @@
+#ifndef SCIQLOP_VISUALIZATIONDEF_H
+#define SCIQLOP_VISUALIZATIONDEF_H
+
+/// Minimum height for graph added in zones (in pixels)
+extern const int GRAPH_MINIMUM_HEIGHT;
+
+#endif // SCIQLOP_VISUALIZATIONDEF_H
diff --git a/gui/src/Common/VisualizationDef.cpp b/gui/src/Common/VisualizationDef.cpp
new file mode 100644
index 0000000..fd2acf3
--- /dev/null
+++ b/gui/src/Common/VisualizationDef.cpp
@@ -0,0 +1,3 @@
+#include "Common/VisualizationDef.h"
+
+const int GRAPH_MINIMUM_HEIGHT = 300;
diff --git a/gui/src/DragDropHelper.cpp b/gui/src/DragDropHelper.cpp
index ec6cbe4..7e91e83 100644
--- a/gui/src/DragDropHelper.cpp
+++ b/gui/src/DragDropHelper.cpp
@@ -169,7 +169,7 @@ struct DragDropHelper::DragDropHelperPrivate {
             // Configuration of the placeHolder when there is no dragWidget
             // (for instance with a drag from a variable)
 
-            m_PlaceHolder->setMinimumSize(400, 300);
+            m_PlaceHolder->setMinimumSize(0, GRAPH_MINIMUM_HEIGHT);
             m_PlaceHolder->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
         }
     }
diff --git a/gui/src/Visualization/VisualizationDragDropContainer.cpp b/gui/src/Visualization/VisualizationDragDropContainer.cpp
index 3ee37ff..e957a28 100644
--- a/gui/src/Visualization/VisualizationDragDropContainer.cpp
+++ b/gui/src/Visualization/VisualizationDragDropContainer.cpp
@@ -3,6 +3,8 @@
 #include "SqpApplication.h"
 #include "Visualization/VisualizationDragWidget.h"
 
+#include "Common/VisualizationDef.h"
+
 #include <QDrag>
 #include <QDragEnterEvent>
 #include <QVBoxLayout>
@@ -262,7 +264,8 @@ void VisualizationDragDropContainer::dragMoveEvent(QDragMoveEvent *event)
 
             auto nbDragWidget = countDragWidget();
             if (nbDragWidget > 0) {
-                auto graphHeight = size().height() / nbDragWidget;
+                auto graphHeight = qMax(size().height() / nbDragWidget, GRAPH_MINIMUM_HEIGHT);
+
                 auto dropIndex = floor(event->pos().y() / graphHeight);
                 auto zoneSize = qMin(graphHeight / 3.0, 150.0);
 
diff --git a/gui/src/Visualization/VisualizationZoneWidget.cpp b/gui/src/Visualization/VisualizationZoneWidget.cpp
index 6c1a28e..ec39bdd 100644
--- a/gui/src/Visualization/VisualizationZoneWidget.cpp
+++ b/gui/src/Visualization/VisualizationZoneWidget.cpp
@@ -7,6 +7,8 @@
 #include "ui_VisualizationZoneWidget.h"
 
 #include "Common/MimeTypesDef.h"
+#include "Common/VisualizationDef.h"
+
 #include <Data/SqpRange.h>
 #include <Variable/Variable.h>
 #include <Variable/VariableController.h>
@@ -24,8 +26,6 @@ Q_LOGGING_CATEGORY(LOG_VisualizationZoneWidget, "VisualizationZoneWidget")
 
 namespace {
 
-/// Minimum height for graph added in zones (in pixels)
-const auto GRAPH_MINIMUM_HEIGHT = 300;
 
 /// Generates a default name for a new graph, according to the number of graphs already displayed in
 /// the zone