diff --git a/src/misc/furtherinitialize.cpp.inl b/src/misc/furtherinitialize.cpp.inl
index 1a791d8189..7d17280364 100644
--- a/src/misc/furtherinitialize.cpp.inl
+++ b/src/misc/furtherinitialize.cpp.inl
@@ -198,6 +198,16 @@ QString Simulation::furtherInitialize() const
 
                 if (   (QString::fromStdString(sedmlPlot2dPropertiesNode.getURI()) == SEDMLSupport::OpencorNamespace)
                     && (QString::fromStdString(sedmlPlot2dPropertiesNode.getName()) == SEDMLSupport::Properties)) {
+#ifdef GUI_SUPPORT
+                    std::string versionValue = sedmlPlot2dPropertiesNode.getAttrValue(qPrintable(SEDMLSupport::Version));
+                    int version = SEDMLSupport::VersionValue;
+
+                    try {
+                        version = versionValue.empty()?1:std::stoi(versionValue);
+                    } catch (...) {
+                    }
+#endif
+
                     for (uint k = 0, kMax = sedmlPlot2dPropertiesNode.getNumChildren(); k < kMax; ++k) {
                         libsbml::XMLNode &sedmlPlot2dPropertyNode = sedmlPlot2dPropertiesNode.getChild(k);
 
@@ -208,7 +218,11 @@ QString Simulation::furtherInitialize() const
                             if (sedmlPlot2dPropertyNodeName == SEDMLSupport::BackgroundColor) {
                                 graphPanelProperties[0]->setValue(sedmlPlot2dPropertyNodeValue);
                             } else if (sedmlPlot2dPropertyNodeName == SEDMLSupport::FontSize) {
-                                graphPanelProperties[1]->setValue(sedmlPlot2dPropertyNodeValue);
+                                if (version == 1) {
+                                    graphPanelProperties[1]->setValue(QString::number(2*sedmlPlot2dPropertyNodeValue.toInt()));
+                                } else {
+                                    graphPanelProperties[1]->setValue(sedmlPlot2dPropertyNodeValue);
+                                }
 
                                 // Note: the below is in case we are dealing
                                 //       with an old SED-ML file where we had
diff --git a/src/plugins/simulation/SimulationExperimentView/src/simulationexperimentviewsimulationwidget.cpp b/src/plugins/simulation/SimulationExperimentView/src/simulationexperimentviewsimulationwidget.cpp
index 4da3fd6af1..e2c034c3c9 100644
--- a/src/plugins/simulation/SimulationExperimentView/src/simulationexperimentviewsimulationwidget.cpp
+++ b/src/plugins/simulation/SimulationExperimentView/src/simulationexperimentviewsimulationwidget.cpp
@@ -1987,10 +1987,12 @@ bool SimulationExperimentViewSimulationWidget::createSedmlFile(SEDMLSupport::Sed
 
         // Add our properties as an annotation
 
-        sedmlPlot2d->appendAnnotation(QString(R"(<%1 xmlns="%2">)"
-                                               "    %3"
+        sedmlPlot2d->appendAnnotation(QString(R"(<%1 %2="%3" xmlns="%4">)"
+                                               "    %5"
                                                "</%1>").arg(SEDMLSupport::Properties,
-                                                            SEDMLSupport::OpencorNamespace,
+                                                            SEDMLSupport::Version)
+                                                       .arg(SEDMLSupport::VersionValue)
+                                                       .arg(SEDMLSupport::OpencorNamespace,
                                                             annotation).toStdString());
 
         // Keep track of the graph panel's graphs, if any
diff --git a/src/plugins/support/SEDMLSupport/src/sedmlfile.h b/src/plugins/support/SEDMLSupport/src/sedmlfile.h
index 339cfe2e1c..51d7fa201c 100644
--- a/src/plugins/support/SEDMLSupport/src/sedmlfile.h
+++ b/src/plugins/support/SEDMLSupport/src/sedmlfile.h
@@ -67,6 +67,8 @@ namespace SEDMLSupport {
 //==============================================================================
 
 static const auto OpencorNamespace = QStringLiteral("http://www.opencor.ws/");
+static const auto Version          = QStringLiteral("version");
+static const auto VersionValue     = 2;
 static const auto VariableDegree   = QStringLiteral("variableDegree");
 static const auto SolverProperties = QStringLiteral("solverProperties");
 static const auto SolverProperty   = QStringLiteral("solverProperty");
diff --git a/src/plugins/widget/GraphPanelWidget/src/graphpanelplotwidget.cpp b/src/plugins/widget/GraphPanelWidget/src/graphpanelplotwidget.cpp
index 0bad96aab5..b37a5dbe9a 100644
--- a/src/plugins/widget/GraphPanelWidget/src/graphpanelplotwidget.cpp
+++ b/src/plugins/widget/GraphPanelWidget/src/graphpanelplotwidget.cpp
@@ -2458,10 +2458,7 @@ void GraphPanelPlotWidget::setTitle(const QString &pTitle)
         QwtText title = QwtText(pTitle);
         QFont newFont = title.font();
 
-        newFont.setPointSize(2*fontSize());
-//---ISSUE2271--- WE WILL EVENTUALLY HAVE TO REMOVE THAT SCALING FACTOR AND,
-//                INSTEAD, HAVE THE MAIN FONT SIZE PROPERTY SCALED DOUBLED WHEN
-//                DEALING WITH AN OLD SED-ML FILE...
+        newFont.setPointSize(fontSize());
 
         title.setColor(mSurroundingAreaForegroundColor);
         title.setFont(newFont);