diff --git a/org.fortiss.tooling.common.ui/res/jfxtras/JMetroLightTheme.css b/org.fortiss.tooling.common.ui/res/jfxtras/JMetroLightTheme.css
index 430a4aea38df1b53eda7d6fe9eb881908092d621..f7ea6bf9dec912d8db17fc22c4ef3a78b697473c 100644
--- a/org.fortiss.tooling.common.ui/res/jfxtras/JMetroLightTheme.css
+++ b/org.fortiss.tooling.common.ui/res/jfxtras/JMetroLightTheme.css
@@ -115,7 +115,7 @@
 }
 
 .toggle-button:selected {
-    -fx-background-color: black;
+    -fx-background-color: #7c7c7c;
     -fx-text-fill: white;
 }
 
diff --git a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/.ratings b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/.ratings
index 176f2e90ee161d7a69b81f78cca084cf1caa4eb3..5a5921339ebffcf550cf7766733a85d6b7bddf82 100644
--- a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/.ratings
+++ b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/.ratings
@@ -6,7 +6,7 @@ DynamicTreeContentProviderBase.java 91896b1fb5104d126544c44c1ff8c30f2a13a8d6 GRE
 DynamicTreeItem.java 7486071d20e896d6ca9a9101bf105caccf3656d0 GREEN
 DynamicTreeItemBase.java d883066ecc181120302ca32f328538de7a45b093 GREEN
 DynamicTreeTableUIProviderBase.java b326c4b666e54285ebbb67570da05d002d52fb3c GREEN
-DynamicTreeTableViewer.java 51e2658564cdea5e6d96ac898a43764787d7bb9e GREEN
+DynamicTreeTableViewer.java ead6f6671e9cb6b14632940bf440cba7e81fcd98 GREEN
 DynamicTreeUIProviderBase.java 82d3c051213f0147f4c67ad247a08696cee73110 GREEN
 DynamicTreeViewer.java e58d2cf7239e45f1b790ce9770a8a8649b1b5fb9 GREEN
 DynamicTreeViewerBase.java a2013538b62d86f6a09efdf2cd78babac2072484 GREEN
diff --git a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicTreeTableViewer.java b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicTreeTableViewer.java
index 51e2658564cdea5e6d96ac898a43764787d7bb9e..ead6f6671e9cb6b14632940bf440cba7e81fcd98 100644
--- a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicTreeTableViewer.java
+++ b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/control/treetableview/DynamicTreeTableViewer.java
@@ -24,6 +24,7 @@ import java.util.function.Supplier;
 import java.util.stream.Stream;
 
 import javafx.beans.property.SimpleObjectProperty;
+import javafx.scene.control.Label;
 import javafx.scene.control.SelectionMode;
 import javafx.scene.control.TreeItem;
 import javafx.scene.control.TreeTableColumn;
@@ -98,6 +99,7 @@ public final class DynamicTreeTableViewer<T> extends DynamicTreeViewerBase<T> {
 		view.setRoot(rootItem);
 		view.setShowRoot(showRoot);
 		view.setEditable(true);
+		view.setPlaceholder(new Label(""));
 		view.setRowFactory(new Callback<TreeTableView<T>, TreeTableRow<T>>() {
 			@Override
 			public TreeTableRow<T> call(TreeTableView<T> param) {
diff --git a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/.ratings b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/.ratings
index 5dab08ee9a72e5c2fd7404de7bbe90667177277f..621549f824000c4799326700a887587171823944 100644
--- a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/.ratings
+++ b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/.ratings
@@ -1,4 +1,4 @@
-ErrorViewFXLayoutController.java 5549b928801393c169983c116c5a23aa19b3e291 GREEN
-ErrorViewFXViewPart.java f620022aef647d7a019be8afc5351fabde05dcee GREEN
+ErrorViewFXLayoutController.java 7ebabd6d7dcaa33f92ed2343e6288af526c5bb88 GREEN
+ErrorViewFXViewPart.java 5952131056eb8fa8630cad84080a04720fd04bc1 GREEN
 MarkerViewFXContentProvider.java ecf92449414b2b8648ad151bc932189baa23dc12 GREEN
 MarkerViewFXUIProvider.java c5719d95ac7bd5605fff65d6150eca8b9ca6fc02 GREEN
diff --git a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXLayoutController.java b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXLayoutController.java
index 5549b928801393c169983c116c5a23aa19b3e291..7ebabd6d7dcaa33f92ed2343e6288af526c5bb88 100644
--- a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXLayoutController.java
+++ b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXLayoutController.java
@@ -45,7 +45,6 @@ import javafx.scene.layout.BorderPane;
  * 
  * @author abid
  */
-
 public class ErrorViewFXLayoutController extends CompositeFXControllerBase<Node, Node> {
 
 	/** Debug Button */
diff --git a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXViewPart.java b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXViewPart.java
index f620022aef647d7a019be8afc5351fabde05dcee..5952131056eb8fa8630cad84080a04720fd04bc1 100644
--- a/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXViewPart.java
+++ b/org.fortiss.tooling.kernel.ui/src/org/fortiss/tooling/kernel/ui/internal/views/fx/ErrorViewFXViewPart.java
@@ -21,7 +21,7 @@ import java.util.Map;
 import org.fortiss.tooling.common.ui.javafx.AF3FXViewPart;
 import org.fortiss.tooling.kernel.extension.data.IConstraintViolation.ESeverity;
 
-/** 
+/**
  * JavaFX view part of the Marker View.
  * 
  * Wrapper for the {@link ErrorViewFXViewPart}. This class can be referenced in the
@@ -29,7 +29,6 @@ import org.fortiss.tooling.kernel.extension.data.IConstraintViolation.ESeverity;
  * 
  * @author abid
  */
-
 public class ErrorViewFXViewPart extends AF3FXViewPart {
 
 	/** The classes ID. */
@@ -39,7 +38,6 @@ public class ErrorViewFXViewPart extends AF3FXViewPart {
 	private static Map<ESeverity, Boolean> toggleState = new HashMap<ESeverity, Boolean>();
 
 	/** Constructor. */
-
 	public ErrorViewFXViewPart() throws Exception {
 		super(new ErrorViewFXLayoutController(toggleState), null);
 	}