diff --git a/mainwindow.cpp b/mainwindow.cpp
index b29574c..4999cde 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -47,6 +47,8 @@ MainWindow::MainWindow()
 
     // Connect dock outputs
     connect(plots, SIGNAL(timeSelectionChanged(float)), dock, SLOT(timeSelectionChanged(float)));
+    connect(plots, SIGNAL(zoomIn()), dock, SLOT(zoomIn()));
+    connect(plots, SIGNAL(zoomOut()), dock, SLOT(zoomOut()));
 
     // Set defaults after making connections so everything is in sync
     dock->setDefaults();
diff --git a/plotview.h b/plotview.h
index 520f250..5e9e6bd 100644
--- a/plotview.h
+++ b/plotview.h
@@ -38,6 +38,8 @@ public:
 
 signals:
     void timeSelectionChanged(float time);
+    void zoomIn();
+    void zoomOut();
 
 public slots:
     void cursorsMoved();
diff --git a/spectrogramcontrols.cpp b/spectrogramcontrols.cpp
index c004224..f6c00fc 100644
--- a/spectrogramcontrols.cpp
+++ b/spectrogramcontrols.cpp
@@ -142,3 +142,13 @@ void SpectrogramControls::timeSelectionChanged(float time)
         bitSelectionFreqLabel->setText(QString::number(bits / time) + "Hz");
     }
 }
+
+void SpectrogramControls::zoomIn()
+{
+    zoomLevelSlider->setValue(zoomLevelSlider->value() + 1);
+}
+
+void SpectrogramControls::zoomOut()
+{
+    zoomLevelSlider->setValue(zoomLevelSlider->value() - 1);
+}
diff --git a/spectrogramcontrols.h b/spectrogramcontrols.h
index 09c0a5e..92aba7a 100644
--- a/spectrogramcontrols.h
+++ b/spectrogramcontrols.h
@@ -42,6 +42,8 @@ signals:
 
 public slots:
     void timeSelectionChanged(float time);
+    void zoomIn();
+    void zoomOut();
 
 private slots:
     void fftOrZoomChanged(int value);