diff --git a/src/main/java/de/embl/schwab/crosshair/Crosshair.java b/src/main/java/de/embl/schwab/crosshair/Crosshair.java
index 54cbf55..59017f3 100644
--- a/src/main/java/de/embl/schwab/crosshair/Crosshair.java
+++ b/src/main/java/de/embl/schwab/crosshair/Crosshair.java
@@ -47,6 +47,7 @@ public class Crosshair {
 
 	private BdvHandle bdvHandle; // bdvHandle of the BigDataViewer window
 	private Image3DUniverse universe; // universe of the 3D viewer
+	private CrosshairFrame crosshairFrame; // crosshair control panel
 	private Content imageContent; // image content displayed in 3D viewer
 	private PlaneManager planeManager;
 	private MicrotomeManager microtomeManager;
@@ -120,7 +121,7 @@ private void initialiseCrosshair(BdvStackSource bdvStackSource, Image3DUniverse
 		microtomeManager = new MicrotomeManager(planeManager, universe, imageContent, bdvStackSource, unit);
 		new BdvBehaviours(bdvHandle, planeManager, microtomeManager);
 
-		CrosshairFrame crosshairFrame = new CrosshairFrame(this);
+		crosshairFrame = new CrosshairFrame(this);
 
 		spaceOutWindows( crosshairFrame, bdvHandle, universe );
 	}
@@ -148,4 +149,6 @@ public PlaneManager getPlaneManager() {
 	public String getUnit() {
 		return unit;
 	}
+
+	public CrosshairFrame getCrosshairFrame() { return crosshairFrame; }
 }
diff --git a/src/test/java/de/embl/schwab/crosshair/CrosshairTest.java b/src/test/java/de/embl/schwab/crosshair/CrosshairTest.java
index 777d93c..f903caf 100644
--- a/src/test/java/de/embl/schwab/crosshair/CrosshairTest.java
+++ b/src/test/java/de/embl/schwab/crosshair/CrosshairTest.java
@@ -3,6 +3,8 @@
 import de.embl.cba.bdv.utils.sources.LazySpimSource;
 import org.junit.jupiter.api.Test;
 
+import javax.swing.*;
+import java.awt.*;
 import java.io.File;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -17,9 +19,39 @@ void openCrosshairFromBdv() {
         final LazySpimSource imageSource = new LazySpimSource("raw", xray.getAbsolutePath());
         Crosshair crosshair = new Crosshair(imageSource);
 
-        // Check successfully created a bdv window + 3D viewer
+        // Check successfully created crosshair controls, bdv window + 3D viewer
+        assertNotNull(crosshair.getCrosshairFrame());
         assertNotNull(crosshair.getBdvHandle());
         assertNotNull(crosshair.getUniverse());
+
+        // Check all windows on screen + not overlapping
+        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
+        Window[] windows = new Window[]{
+                crosshair.getCrosshairFrame(),
+                SwingUtilities.getWindowAncestor(crosshair.getBdvHandle().getViewerPanel()),
+                crosshair.getUniverse().getWindow()
+        };
+        int[] xMins = new int[windows.length];
+        int[] xMaxes = new int[windows.length];
+
+        for (int i = 0; i < windows.length; i++) {
+            Window window = windows[i];
+
+            // Check height within screen limits
+            assertTrue(window.getLocationOnScreen().y >= 0);
+            assertTrue(window.getLocationOnScreen().y + window.getHeight() <= screenSize.height);
+
+            xMins[i] = window.getLocationOnScreen().x;
+            xMaxes[i] = window.getLocationOnScreen().x + window.getWidth();
+
+            // check width within screen limits
+            assertTrue(xMins[i] >= 0);
+            assertTrue(xMaxes[i] <= screenSize.width);
+        }
+
+        // Check windows don't overlap
+        assertTrue(xMaxes[0] <= xMins[1]);
+        assertTrue(xMaxes[1] <= xMins[2]);
     }
 
 }
\ No newline at end of file