diff --git a/client-api/C++/examples/all_commands.cpp b/client-api/C++/examples/all_commands.cpp
index 549afb1..b4bc132 100644
--- a/client-api/C++/examples/all_commands.cpp
+++ b/client-api/C++/examples/all_commands.cpp
@@ -142,6 +142,44 @@ int main()
         VIBES_TEST( vibes::axisLabels(labels) );
     }
 
+    cout << "plotting y=abs(cos(x)), y=abs(sin(x)), y=abs(sin(sin(x)))"<<endl;
+    {
+        const int nbPts = 1000;
+        const double xStep = 0.01;
+
+        std::vector< std::vector<double> > points;
+        std::vector<double> point(2);
+        std::vector< double > vect_x2;
+        std::vector< double > vect_y2;
+        
+        std::vector< double > vect_x3;
+        std::vector< double > vect_y3;
+        for (int i=0; i<nbPts; ++i)
+        {
+            const double x = xStep * i;
+            point[0] = x;
+            point[1] = fabs(cos(x));
+            points.push_back(point);
+            
+            vect_x2.push_back(x);
+            vect_y2.push_back(fabs(sin(x)));
+            
+            vect_x3.push_back(x);
+            vect_y3.push_back(sin(sin(x)));
+        }
+        VIBES_TEST( vibes::newFigure("abs(cos), abs(sin), sin(sin)") );
+        VIBES_TEST( vibes::drawLine(points,"tomato-..") );
+        VIBES_TEST(vibes::drawLine(vect_x2,vect_y2,vibesParams("LineWidth",0.07,"LineStyle",":","EdgeColor",(vibes::RGBA){255,255,255,255})));
+        VIBES_TEST(vibes::drawLine(vect_x3,vect_y3,vibesParams("LineWidth",0.0042,"LineStyle","--","EdgeColor",(vibes::RGBA){0,128,128,108})));
+
+        VIBES_TEST( vibes::axisAuto() );
+
+        VIBES_TEST( vibes::setFigureProperties("abs(cos)",
+                                                vibesParams("x",0,"y",220,"width",450,"height",100)) );
+        std::vector<std::string> labels;
+        labels.push_back("x"); labels.push_back("abs cos x"); labels.push_back("abs sin x"); labels.push_back("sin sin x");
+        VIBES_TEST( vibes::axisLabels(labels) );
+    }
 
     VIBES_TEST( vibes::newFigure("figureTest") );
 
@@ -182,7 +220,7 @@ int main()
         x.push_back(2);     y.push_back(7);
         x.push_back(0.5);   y.push_back(4);
         x.push_back(-0.5);  y.push_back(4);
-        VIBES_TEST( vibes::drawPolygon(x, y, "yellow[red]") );
+        VIBES_TEST( vibes::drawPolygon(x, y, "red--[yellowgreen]") );
     }
 
     cout << "drawVehicle" << std::endl;
diff --git a/viewer/vibesgraphicsitem.cpp b/viewer/vibesgraphicsitem.cpp
index e9de77b..d77561d 100644
--- a/viewer/vibesgraphicsitem.cpp
+++ b/viewer/vibesgraphicsitem.cpp
@@ -884,7 +884,7 @@ bool VibesGraphicsLine::computeProjection(int dimX, int dimY)
 
     // Get line color (or default if not specified)
     //const QBrush & brush = vibesDefaults.brush( jsonValue("FaceColor").toString() );
-    const QPen & pen = vibesDefaults.pen( jsonValue("EdgeColor") );
+    QPen pen = vibesDefaults.pen( jsonValue("EdgeColor") );
 
     // Now process shape-specific properties
     // (we can only update properties of a shape, but mutation into another type is not supported)
@@ -906,6 +906,19 @@ bool VibesGraphicsLine::computeProjection(int dimX, int dimY)
     path.addPolygon(polygon);
     this->setPath(path);
     // Set graphics properties
+    // Handle lineStyle
+    if(json.contains("LineStyle"))
+    {
+        Q_ASSERT(json["LineStyle"].isString());
+        string style=json["LineStyle"].toString().toStdString();
+        pen.setStyle(vibesDefaults.styleToPenStyle(style));
+    }
+    // Handle lineStyle
+    if(json.contains("LineWidth"))
+    {
+        Q_ASSERT(json["LineWidth"].isDouble());
+        pen.setWidthF(std::fmax(json["LineWidth"].toDouble(0),0));
+    }
     this->setPen(pen);
     //this->setBrush(brush);
 
@@ -954,8 +967,8 @@ bool VibesGraphicsPolygon::computeProjection(int dimX, int dimY)
     const QJsonObject & json = this->_json;
 
     // Get shape color (or default if not specified)
-    const QBrush & brush = vibesDefaults.brush( jsonValue("FaceColor") );
-    const QPen & pen = vibesDefaults.pen( jsonValue("EdgeColor") );
+    QBrush brush = vibesDefaults.brush( jsonValue("FaceColor") );
+    QPen pen = vibesDefaults.pen( jsonValue("EdgeColor") );
 
     Q_ASSERT(json.contains("type"));
     Q_ASSERT(json["type"].toString() == "polygon");
@@ -970,6 +983,21 @@ bool VibesGraphicsPolygon::computeProjection(int dimX, int dimY)
     this->setPolygon(polygon);
 
     // Update polygon color
+    
+    // Set graphics properties
+    // Handle lineStyle
+    if(json.contains("LineStyle"))
+    {
+        Q_ASSERT(json["LineStyle"].isString());
+        string style=json["LineStyle"].toString().toStdString();
+        pen.setStyle(vibesDefaults.styleToPenStyle(style));
+    }
+    // Handle lineStyle
+    if(json.contains("LineWidth"))
+    {
+        Q_ASSERT(json["LineWidth"].isDouble());
+        pen.setWidthF(std::fmax(json["LineWidth"].toDouble(0),0));
+    }
     this->setPen(pen);
     this->setBrush(brush);
 
diff --git a/viewer/vibesgraphicsitem.h b/viewer/vibesgraphicsitem.h
index 9b7b11f..a9ba426 100644
--- a/viewer/vibesgraphicsitem.h
+++ b/viewer/vibesgraphicsitem.h
@@ -120,6 +120,11 @@ class VibesDefaults {
                 name=value.toString();
             }
         }
+        QColor c(name.toLower());
+        if(c.isValid())
+        {
+            return QBrush(c);
+        }
         return _brushes[name]; 
     }
     
@@ -143,6 +148,12 @@ class VibesDefaults {
                 name=value.toString();
             }
         }
+        QColor c;
+        c.setNamedColor(name.toLower());
+        if(c.isValid())
+        {
+            return QPen(c,0);
+        }
         return _pens[name];
     }
 private: