diff --git a/src/main/java/org/olat/core/commons/fullWebApp/BaseFullWebappWindowControl.java b/src/main/java/org/olat/core/commons/fullWebApp/BaseFullWebappWindowControl.java
index 2064ef73107b8be9a6a2b156678fbca80ab28bc9..018a975c545a4e1317c33a6d58a2f8bbc0757057 100644
--- a/src/main/java/org/olat/core/commons/fullWebApp/BaseFullWebappWindowControl.java
+++ b/src/main/java/org/olat/core/commons/fullWebApp/BaseFullWebappWindowControl.java
@@ -20,6 +20,9 @@
 package org.olat.core.commons.fullWebApp;
 
 import org.olat.core.gui.components.Component;
+import org.olat.core.gui.control.ChiefController;
+import org.olat.core.gui.control.Controller;
+import org.olat.core.gui.control.ScreenMode.Mode;
 import org.olat.core.gui.control.WindowBackOffice;
 import org.olat.core.gui.control.WindowControl;
 import org.olat.core.gui.control.WindowControlInfoImpl;
@@ -39,6 +42,8 @@ class BaseFullWebappWindowControl implements WindowControl {
 	private final WindowControlInfo wci;
 	private final WindowBackOffice wbo;
 	private final BaseFullWebappController webappCtrl;
+	
+	private Component fullScreenCmp;
 
 	public BaseFullWebappWindowControl(BaseFullWebappController webappCtrl, WindowBackOffice wbo) {
 		this.wbo = wbo;
@@ -46,17 +51,12 @@ class BaseFullWebappWindowControl implements WindowControl {
 		wci = new WindowControlInfoImpl(webappCtrl, null);
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#pushToMainArea(org.olat.core.gui.components.Component)
-	 */
+	@Override
 	public void pushToMainArea(Component newMainArea) {
 		webappCtrl.getCurrentGuiStack().pushContent(newMainArea);
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#pushAsModalDialog(java.lang.String,
-	 *      org.olat.core.gui.components.Component)
-	 */
+	@Override
 	public void pushAsModalDialog(Component newModalDialog) {
 		webappCtrl.getCurrentGuiStack().pushModalDialog(newModalDialog);
 	}
@@ -66,17 +66,28 @@ class BaseFullWebappWindowControl implements WindowControl {
 		webappCtrl.getCurrentGuiStack().pushCallout(comp, targetId, settings);
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#pop()
-	 */
+	@Override
+	public void pushFullScreen(Controller ctrl, String bodyClass) {
+		ChiefController cc = getWindowBackOffice().getChiefController();
+		String businessPath = ctrl.getWindowControlForDebug().getBusinessControl().getAsString();
+		cc.getScreenMode().setMode(Mode.full, businessPath, bodyClass);
+		fullScreenCmp = ctrl.getInitialComponent();
+		webappCtrl.getCurrentGuiStack().pushContent(fullScreenCmp);
+	}
+
+	@Override
 	public void pop() {
 		// reactivate latest dialog from stack, dumping current one
-		webappCtrl.getCurrentGuiStack().popContent();
+		Component popedComponent = webappCtrl.getCurrentGuiStack().popContent();
+		if(popedComponent != null && popedComponent == fullScreenCmp) {
+			String businessPath = getBusinessControl().getAsString();
+			ChiefController cc = getWindowBackOffice().getChiefController();
+			cc.getScreenMode().setMode(Mode.standard, businessPath);
+			fullScreenCmp = null;
+		}
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#setInfo(java.lang.String)
-	 */
+	@Override
 	public void setInfo(String info) {
 		webappCtrl.getGUIMessage().setInfo(info);
 		webappCtrl.getGUIMsgPanel().setContent(webappCtrl.getGUIMsgVc());
@@ -84,34 +95,34 @@ class BaseFullWebappWindowControl implements WindowControl {
 		// setInfo is called input guimsgPanel into the correct place
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#setError(java.lang.String)
-	 */
+	@Override
 	public void setError(String error) {
 		webappCtrl.getGUIMessage().setError(error);
 		webappCtrl.getGUIMsgPanel().setContent(webappCtrl.getGUIMsgVc());
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#setWarning(java.lang.String)
-	 */
+	@Override
 	public void setWarning(String warning) {
 		webappCtrl.getGUIMessage().setWarn(warning);
 		webappCtrl.getGUIMsgPanel().setContent(webappCtrl.getGUIMsgVc());
 	}
 
+	@Override
 	public WindowControlInfo getWindowControlInfo() {
 		return wci;
 	}
 
+	@Override
 	public void makeFlat() {
 		throw new AssertException("should never be called!");
 	}
 
+	@Override
 	public BusinessControl getBusinessControl() {
 		return BusinessControlFactory.getInstance().getEmptyBusinessControl();
 	}
 
+	@Override
 	public WindowBackOffice getWindowBackOffice() {
 		return wbo;
 	}
diff --git a/src/main/java/org/olat/core/commons/services/doceditor/ui/DocEditorFullscreenController.java b/src/main/java/org/olat/core/commons/services/doceditor/ui/DocEditorFullscreenController.java
index d6188bf74d55a06456e2a3e5fc03be1d0413e8c7..d719e8977dc9b27853fdae026dcb0f283f7e0e45 100644
--- a/src/main/java/org/olat/core/commons/services/doceditor/ui/DocEditorFullscreenController.java
+++ b/src/main/java/org/olat/core/commons/services/doceditor/ui/DocEditorFullscreenController.java
@@ -23,10 +23,8 @@ import org.olat.core.commons.services.doceditor.DocEditorConfigs;
 import org.olat.core.commons.services.doceditor.DocEditorSecurityCallback;
 import org.olat.core.gui.UserRequest;
 import org.olat.core.gui.components.Component;
-import org.olat.core.gui.control.ChiefController;
 import org.olat.core.gui.control.Controller;
 import org.olat.core.gui.control.Event;
-import org.olat.core.gui.control.ScreenMode.Mode;
 import org.olat.core.gui.control.WindowControl;
 import org.olat.core.gui.control.controller.BasicController;
 import org.olat.core.util.vfs.VFSLeaf;
@@ -71,30 +69,21 @@ public class DocEditorFullscreenController extends BasicController {
 		//
 	}
 
-	@SuppressWarnings("deprecation")
 	private void doOpenEditor() {
-		ChiefController cc = getWindowControl().getWindowBackOffice().getChiefController();
-		String businessPath = editorCtrl.getWindowControlForDebug().getBusinessControl().getAsString();
-		cc.getScreenMode().setMode(Mode.full, businessPath);
-		cc.addBodyCssClass("o_doceditor_body");
-		getWindowControl().pushToMainArea(editorCtrl.getInitialComponent());
+		getWindowControl().pushFullScreen(editorCtrl, "o_doceditor_body");
 	}
 	
 	private void doCloseEditor() {
 		getWindowControl().pop();
-		String businessPath = getWindowControl().getBusinessControl().getAsString();
-		ChiefController cc = getWindowControl().getWindowBackOffice().getChiefController();
-		cc.getScreenMode().setMode(Mode.standard, businessPath);
-		cc.removeBodyCssClass("o_doceditor_body");
-		
 		removeAsListenerAndDispose(editorCtrl);
 		editorCtrl = null;
 	}
-	
 
 	@Override
 	protected void doDispose() {
-		//
+		if(editorCtrl != null) {
+			removeAsListenerAndDispose(editorCtrl);
+			editorCtrl = null;
+		}
 	}
-
 }
diff --git a/src/main/java/org/olat/core/gui/components/panel/SimpleStackedPanel.java b/src/main/java/org/olat/core/gui/components/panel/SimpleStackedPanel.java
index aa91e0eadefcb8ee152f3d39b1cb6731ac1f396c..53d8bc3921b77c0510acbac8f254297325fadd51 100644
--- a/src/main/java/org/olat/core/gui/components/panel/SimpleStackedPanel.java
+++ b/src/main/java/org/olat/core/gui/components/panel/SimpleStackedPanel.java
@@ -131,22 +131,20 @@ public class SimpleStackedPanel extends AbstractComponent implements StackedPane
 	}
 
 	@Override
-	public void popContent() {
+	public Component popContent() {
 		int stackHeight = stackList.size();
 		if (stackHeight < 1) throw new AssertException("stack was empty!");
 		if (curContent == null) throw new AssertException("stackHeight not zero, but curContent was null!");
-		stackList.remove(stackHeight - 1); // remove the top component
+		Component popedComponent = stackList.remove(stackHeight - 1); // remove the top component
 		if (stackHeight == 1) { // after pop, the content is null
 			curContent = null;
 		} else { // stackHeight > 1
 			curContent = stackList.get(stackHeight - 2);
 		}
 		setDirty(true);
+		return popedComponent;
 	}
 
-	/**
-	 * @see org.olat.core.gui.components.Component#getExtendedDebugInfo()
-	 */
 	@Override
 	public String getExtendedDebugInfo() {
 		StringBuilder sb = new StringBuilder();
diff --git a/src/main/java/org/olat/core/gui/components/panel/StackedPanel.java b/src/main/java/org/olat/core/gui/components/panel/StackedPanel.java
index 4732f21a623644570dff22bd0200ad8dc5a50c35..e0ab6e10ec2c95b1893536a983ceb16706cd5925 100644
--- a/src/main/java/org/olat/core/gui/components/panel/StackedPanel.java
+++ b/src/main/java/org/olat/core/gui/components/panel/StackedPanel.java
@@ -42,7 +42,7 @@ public interface StackedPanel extends ComponentCollection {
 	
 	public void setContent(Component component);
 	
-	public void popContent();
+	public Component popContent();
 	
 	/**
 	 * @param newContent may not be null
diff --git a/src/main/java/org/olat/core/gui/components/stack/BreadcrumbedStackedPanel.java b/src/main/java/org/olat/core/gui/components/stack/BreadcrumbedStackedPanel.java
index 36ea981a5b5407c55b3f2c92986db8a2b38569eb..cfb7b07bb4287fb92f7451b5aa0922f5cc5de521 100644
--- a/src/main/java/org/olat/core/gui/components/stack/BreadcrumbedStackedPanel.java
+++ b/src/main/java/org/olat/core/gui/components/stack/BreadcrumbedStackedPanel.java
@@ -285,12 +285,17 @@ public class BreadcrumbedStackedPanel extends Panel implements StackedPanel, Bre
 	}
 
 	@Override
-	public void popContent() {
+	public Component popContent() {
+		Component component = null;
 		if(stack.size() > 1) {
 			Link link = stack.remove(stack.size() - 1);
 			BreadCrumb crumb = (BreadCrumb)link.getUserObject();
+			if(crumb.getController() != null) {
+				component = crumb.getController().getInitialComponent();
+			}
 			crumb.dispose();
 		}
+		return component;
 	}
 
 	@Override
@@ -378,7 +383,7 @@ public class BreadcrumbedStackedPanel extends Panel implements StackedPanel, Bre
 				Link link = stack.get(i);
 				popedCrumb = (BreadCrumb)link.getUserObject();
 			}
-			return popedCrumb.getController();
+			return popedCrumb == null ? null : popedCrumb.getController();
 		}
 		return null;
 	}
diff --git a/src/main/java/org/olat/core/gui/control/LocalWindowControl.java b/src/main/java/org/olat/core/gui/control/LocalWindowControl.java
index ed2b06e6c43a76233325372d56fc6efe057a76e5..6a762f222f44683c380c9ee024b1fbde85a3823b 100644
--- a/src/main/java/org/olat/core/gui/control/LocalWindowControl.java
+++ b/src/main/java/org/olat/core/gui/control/LocalWindowControl.java
@@ -42,7 +42,6 @@ public class LocalWindowControl implements WindowControl {
 	private static final Logger log = Tracing.createLoggerFor(LocalWindowControl.class);
 	private final WindowControl origWControl;
 	private int localHeight = 0;
-	//private final Controller controller;
 	private final WindowControlInfoImpl wci;
 	
 	LocalWindowControl(WindowControl origWControl, DefaultController defaultcontroller) {
@@ -50,9 +49,6 @@ public class LocalWindowControl implements WindowControl {
 		wci = new WindowControlInfoImpl(defaultcontroller, (origWControl == null? null: origWControl.getWindowControlInfo()));
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#pop()
-	 */
 	@Override
 	public void pop() {
 		if (localHeight > 0) {
@@ -63,9 +59,7 @@ public class LocalWindowControl implements WindowControl {
 		}
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#pushAsModalDialog(java.lang.String, org.olat.core.gui.components.Component)
-	 */
+	@Override
 	public void pushAsModalDialog(Component comp) {
 		origWControl.pushAsModalDialog(comp);
 		localHeight++;
@@ -77,36 +71,34 @@ public class LocalWindowControl implements WindowControl {
 		localHeight++;
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#pushToMainArea(org.olat.core.gui.components.Component)
-	 */
+	@Override
+	public void pushFullScreen(Controller ctrl, String bodyClass) {
+		origWControl.pushFullScreen(ctrl, bodyClass);
+		localHeight++;
+	}
+
+	@Override
 	public void pushToMainArea(Component comp) {
 		origWControl.pushToMainArea(comp);
 		localHeight++;
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#setError(java.lang.String)
-	 */
+	@Override
 	public void setError(String string) {
 		origWControl.setError(string);
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#setInfo(java.lang.String)
-	 */
+	@Override
 	public void setInfo(String string) {
 		origWControl.setInfo(string);
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.WindowControl#setWarning(java.lang.String)
-	 */
+	@Override
 	public void setWarning(String string) {
 		origWControl.setWarning(string);
 	}
-	
-	
+
+	@Override
 	public void makeFlat() {
 		for (int i = 0; i < localHeight; i++) {
 			origWControl.pop();
@@ -114,20 +106,17 @@ public class LocalWindowControl implements WindowControl {
 		localHeight = 0;
 	}
 
+	@Override
 	public WindowControlInfo getWindowControlInfo() {
 		return wci;
 	}
 
-	/* (non-Javadoc)
-	 * @see org.olat.core.gui.control.WindowControl#getBusinessControl()
-	 */
+	@Override
 	public BusinessControl getBusinessControl() {
 		return origWControl.getBusinessControl();
 	}
 
-	/* (non-Javadoc)
-	 * @see org.olat.core.gui.control.WindowControl#getWindowBackOffice()
-	 */
+	@Override
 	public WindowBackOffice getWindowBackOffice() {
 		return origWControl.getWindowBackOffice();
 	}
diff --git a/src/main/java/org/olat/core/gui/control/ScreenMode.java b/src/main/java/org/olat/core/gui/control/ScreenMode.java
index cba621243e87b2dc3477748a8a341bfcf0054b02..4e703fa475cb10ff0036dbe16fbd1205c54ab6cf 100644
--- a/src/main/java/org/olat/core/gui/control/ScreenMode.java
+++ b/src/main/java/org/olat/core/gui/control/ScreenMode.java
@@ -29,6 +29,7 @@ public class ScreenMode {
 	private Mode wish;
 	private boolean fullScreen;
 	private String businessPath;
+	private String fullScreenBodyClass;
 
 	public boolean isFullScreen() {
 		return fullScreen;
@@ -44,9 +45,14 @@ public class ScreenMode {
 	 * @param businessPath The business path to beautify the reload (in the form [Repository:3781][CourseNode:23468732]) (optional)
 	 */
 	public void setMode(Mode mode, String businessPath) {
+		setMode(mode, businessPath, fullScreenBodyClass);
+	}
+	
+	public void setMode(Mode mode, String businessPath, String fullScreenBodyClass) {
 		fullScreen = Mode.full.equals(mode);
 		this.wish = mode;
 		this.businessPath = businessPath;
+		this.fullScreenBodyClass = fullScreenBodyClass;
 	}
 	
 	public boolean isWishFullScreen() {
@@ -74,6 +80,10 @@ public class ScreenMode {
 		return businessPath;
 	}
 	
+	public String getFullScreenBodyClass() {
+		return fullScreenBodyClass;
+	}
+	
 	public boolean wishFullScreen(boolean erase) {
 		Mode w = wish;
 		if(erase) {
diff --git a/src/main/java/org/olat/core/gui/control/WindowControl.java b/src/main/java/org/olat/core/gui/control/WindowControl.java
index 4ecc320ac5e2ba7fb8433a09cba23e5621b6c225..f731bdde04826cbb3b282693f7dd09d80c090b39 100644
--- a/src/main/java/org/olat/core/gui/control/WindowControl.java
+++ b/src/main/java/org/olat/core/gui/control/WindowControl.java
@@ -63,7 +63,13 @@ public interface WindowControl {
 	 * @param targetId
 	 */
 	public void pushAsCallout(Component comp, String targetId, CalloutSettings settings);
-	
+
+	/**
+	 * Push a controller to full screen mode.
+	 * @param ctrl 
+	 * @param bodyClass An additional body class (optional)
+	 */
+	public void pushFullScreen(Controller ctrl, String bodyClass);
 
 	/**
 	 * 
diff --git a/src/main/java/org/olat/core/gui/control/guistack/GuiStack.java b/src/main/java/org/olat/core/gui/control/guistack/GuiStack.java
index 7b4022fe1214659f81f8a49144c29677ea45e3b3..82fb79052fb9084395563e8be0cbea3f720b40d1 100644
--- a/src/main/java/org/olat/core/gui/control/guistack/GuiStack.java
+++ b/src/main/java/org/olat/core/gui/control/guistack/GuiStack.java
@@ -30,8 +30,6 @@ import org.olat.core.gui.components.panel.StackedPanel;
 import org.olat.core.gui.control.generic.closablewrapper.CalloutSettings;
 
 /**
- * Description:<br>
- * TODO: Felix Jost Class Description for Trans
  * 
  * <P>
  * Initial Date: 24.01.2007 <br>
@@ -52,15 +50,9 @@ public interface GuiStack {
 	 */
 	public void pushCallout(Component content, String targetId, CalloutSettings settings);
 
-	/**
-	 * @see org.olat.core.gui.control.GuiStackHandle#pushContent(org.olat.core.gui.components.Component)
-	 */
 	public void pushContent(Component newContent);
 
-	/**
-	 * @see org.olat.core.gui.control.GuiStackHandle#popContent()
-	 */
-	public void popContent();
+	public Component popContent();
 
 	/**
 	 * @return
diff --git a/src/main/java/org/olat/core/gui/control/guistack/GuiStackNiceImpl.java b/src/main/java/org/olat/core/gui/control/guistack/GuiStackNiceImpl.java
index 40fd4df6d224fda3f3c05017f7beeea25425e5df..dfb6fd59e9b9ca61f5e5a499cff069e77bbfbc59 100644
--- a/src/main/java/org/olat/core/gui/control/guistack/GuiStackNiceImpl.java
+++ b/src/main/java/org/olat/core/gui/control/guistack/GuiStackNiceImpl.java
@@ -164,9 +164,7 @@ public class GuiStackNiceImpl implements GuiStack {
 		modalLayers++;
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.GuiStackHandle#pushContent(org.olat.core.gui.components.Component)
-	 */
+	@Override
 	public void pushContent(Component newContent) {
 		if (modalLayers > 0) {
 			// if, in a modaldialog, a push-to-main-area is issued, put it on the modal stack.
@@ -178,20 +176,16 @@ public class GuiStackNiceImpl implements GuiStack {
 		}
 	}
 
-	/**
-	 * @see org.olat.core.gui.control.GuiStackHandle#popContent()
-	 */
-	public void popContent() {
+	@Override
+	public Component popContent() {
+		Component popComponent;
 		if (modalLayers > 0) {
 			modalLayers--;
-			modalPanel.popContent();
-			if (modalLayers == 0) {
-				// unblock background panel
-				//panel.setEnabled(true);
-			}
+			popComponent = modalPanel.popContent();
 		} else {
-			panel.popContent();
+			popComponent = panel.popContent();
 		}
+		return popComponent;
 	}
 
 	/**
diff --git a/src/main/java/org/olat/core/gui/util/WindowControlMocker.java b/src/main/java/org/olat/core/gui/util/WindowControlMocker.java
index aaa82ebe515561ed6c3edec9c89c6398f28fbde3..e3464ac2439cb2221faba7ba49d67436b4f454f7 100644
--- a/src/main/java/org/olat/core/gui/util/WindowControlMocker.java
+++ b/src/main/java/org/olat/core/gui/util/WindowControlMocker.java
@@ -65,6 +65,11 @@ public class WindowControlMocker implements WindowControl{
 		//
 	}
 
+	@Override
+	public void pushFullScreen(Controller ctrl, String bodyClass) {
+		//
+	}
+
 	@Override
 	public void pop() {
 		//
diff --git a/src/main/java/org/olat/core/id/context/StackedBusinessWindowControl.java b/src/main/java/org/olat/core/id/context/StackedBusinessWindowControl.java
index 4e2da23ab6180ecb0cd5dca33b5a6638e3e2a8f9..7420f3f466c00b66adcbf702abecaed1dbfd6dda 100644
--- a/src/main/java/org/olat/core/id/context/StackedBusinessWindowControl.java
+++ b/src/main/java/org/olat/core/id/context/StackedBusinessWindowControl.java
@@ -29,6 +29,7 @@
 package org.olat.core.id.context;
 
 import org.olat.core.gui.components.Component;
+import org.olat.core.gui.control.Controller;
 import org.olat.core.gui.control.WindowBackOffice;
 import org.olat.core.gui.control.WindowControl;
 import org.olat.core.gui.control.generic.closablewrapper.CalloutSettings;
@@ -51,24 +52,29 @@ public class StackedBusinessWindowControl implements WindowControl {
 		this.businessControl = businessControl;
 		
 	}
-	
+
+	@Override
 	public BusinessControl getBusinessControl() {
 		// inject the new business control here
 		return businessControl;
 	}
 
+	@Override
 	public WindowControlInfo getWindowControlInfo() {
 		return origWControl.getWindowControlInfo();
 	}
 
+	@Override
 	public void makeFlat() {
 		origWControl.makeFlat();
 	}
 
+	@Override
 	public void pop() {
 		origWControl.pop();
 	}
 
+	@Override
 	public void pushAsModalDialog(Component comp) {
 		origWControl.pushAsModalDialog(comp);
 	}
@@ -78,25 +84,33 @@ public class StackedBusinessWindowControl implements WindowControl {
 		origWControl.pushAsCallout(comp, targetId, settings);
 	}
 
+	@Override
+	public void pushFullScreen(Controller ctrl, String bodyClass) {
+		origWControl.pushFullScreen(ctrl, bodyClass);
+	}
+
+	@Override
 	public void pushToMainArea(Component comp) {
 		origWControl.pushToMainArea(comp);
 	}
 
+	@Override
 	public void setError(String string) {
 		origWControl.setError(string);
 	}
 
+	@Override
 	public void setInfo(String string) {
 		origWControl.setInfo(string);
 	}
 
+	@Override
 	public void setWarning(String string) {
 		origWControl.setWarning(string);
 	}
 
+	@Override
 	public WindowBackOffice getWindowBackOffice() {
 		return origWControl.getWindowBackOffice();
 	}
-	
-
 }
diff --git a/src/main/java/org/olat/restapi/support/ErrorWindowControl.java b/src/main/java/org/olat/restapi/support/ErrorWindowControl.java
index 2b33897877a1a033cac361c651168351cec30f48..4c42e6859cb50c453cd385e79f956be2be61fc15 100644
--- a/src/main/java/org/olat/restapi/support/ErrorWindowControl.java
+++ b/src/main/java/org/olat/restapi/support/ErrorWindowControl.java
@@ -20,6 +20,7 @@
 package org.olat.restapi.support;
 
 import org.olat.core.gui.components.Component;
+import org.olat.core.gui.control.Controller;
 import org.olat.core.gui.control.WindowBackOffice;
 import org.olat.core.gui.control.WindowControl;
 import org.olat.core.gui.control.generic.closablewrapper.CalloutSettings;
@@ -53,6 +54,9 @@ public class ErrorWindowControl implements WindowControl {
 	@Override
 	public void pushAsCallout(Component comp, String targetId, CalloutSettings settings) {/* */}
 
+	@Override
+	public void pushFullScreen(Controller ctrl, String bodyClass) {/* */}
+
 	@Override
 	public void pop() {/* */}
 
diff --git a/src/test/java/org/olat/course/nodes/en/EnrollmentManagerConcurrentTest.java b/src/test/java/org/olat/course/nodes/en/EnrollmentManagerConcurrentTest.java
index 9d8d2cd0f5de16e645bd83b646b2bdbc073bc180..e889b1c94a6e92d0c88bb4778d75212d5783e62f 100644
--- a/src/test/java/org/olat/course/nodes/en/EnrollmentManagerConcurrentTest.java
+++ b/src/test/java/org/olat/course/nodes/en/EnrollmentManagerConcurrentTest.java
@@ -49,6 +49,7 @@ import org.olat.basesecurity.OrganisationService;
 import org.olat.core.commons.persistence.DB;
 import org.olat.core.commons.persistence.DBFactory;
 import org.olat.core.gui.components.Component;
+import org.olat.core.gui.control.Controller;
 import org.olat.core.gui.control.WindowBackOffice;
 import org.olat.core.gui.control.WindowControl;
 import org.olat.core.gui.control.generic.closablewrapper.CalloutSettings;
@@ -436,6 +437,8 @@ public class EnrollmentManagerConcurrentTest extends OlatTestCase implements Win
 	public void pushToMainArea(Component comp){}
 	public void pushAsModalDialog(Component comp){}
 	@Override
+	public void pushFullScreen(Controller ctrl, String bodyClass) {/* */}
+	@Override
 	public void pushAsCallout(Component comp, String targetId, CalloutSettings settings){}
 	public void pop(){}
 	public void setInfo(String string){}