diff --git a/src/plot.cpp b/src/plot.cpp
--- a/src/plot.cpp
+++ b/src/plot.cpp
@@ -98,6 +98,12 @@ void Plot::showMinorGrid(bool show)
     replot();
 }
 
+void Plot::showLegend(bool show)
+{
+    legend.setVisible(show);
+    replot();
+}
+
 void Plot::unzoom()
 {
     zoomer.zoom(0);
diff --git a/src/plot.h b/src/plot.h
--- a/src/plot.h
+++ b/src/plot.h
@@ -56,6 +56,7 @@ private:
 public slots:
     void showGrid(bool show = true);
     void showMinorGrid(bool show = true);
+    void showLegend(bool show = true);
     void unzoom();
     void darkBackground(bool enabled = true);
     void setAxis(bool autoScaled, double yMin = 0, double yMax = 1);
diff --git a/src/plotmanager.cpp b/src/plotmanager.cpp
--- a/src/plotmanager.cpp
+++ b/src/plotmanager.cpp
@@ -70,9 +70,8 @@ PlotManager::PlotManager(QWidget* plotAr
     connect(&unzoomAction, &QAction::triggered, this, &PlotManager::unzoom);
     connect(&darkBackgroundAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),
             this, &PlotManager::darkBackground);
-    // TODO: enable legend
-    // connect(&showLegendAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),
-    //         [this](bool enabled){legend.setVisible(enabled); replot();});
+    connect(&showLegendAction, SELECT<bool>::OVERLOAD_OF(&QAction::triggered),
+            this, &PlotManager::showLegend);
 }
 
 PlotManager::~PlotManager()
@@ -174,7 +173,7 @@ Plot* PlotManager::addPlotWidget()
     plot->darkBackground(darkBackgroundAction.isChecked());
     plot->showGrid(showGridAction.isChecked());
     plot->showMinorGrid(showMinorGridAction.isChecked());
-    // TODO: show legend
+    plot->showLegend(showLegendAction.isChecked());
 
     return plot;
 }
@@ -270,6 +269,7 @@ void PlotManager::showGrid(bool show)
         plot->showGrid(show);
     }
 }
+
 void PlotManager::showMinorGrid(bool show)
 {
     for (auto plot : plotWidgets)
@@ -277,6 +277,15 @@ void PlotManager::showMinorGrid(bool sho
         plot->showMinorGrid(show);
     }
 }
+
+void PlotManager::showLegend(bool show)
+{
+    for (auto plot : plotWidgets)
+    {
+        plot->showLegend(show);
+    }
+}
+
 void PlotManager::unzoom()
 {
     for (auto plot : plotWidgets)
@@ -284,6 +293,7 @@ void PlotManager::unzoom()
         plot->unzoom();
     }
 }
+
 void PlotManager::darkBackground(bool enabled)
 {
     for (auto plot : plotWidgets)
diff --git a/src/plotmanager.h b/src/plotmanager.h
--- a/src/plotmanager.h
+++ b/src/plotmanager.h
@@ -83,6 +83,7 @@ private:
 private slots:
     void showGrid(bool show = true);
     void showMinorGrid(bool show = true);
+    void showLegend(bool show = true);
     void unzoom();
     void darkBackground(bool enabled = true);
 };