diff --git a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/.ratings b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/.ratings
index 07fbfbf0cef067efae30e0271183f7b36e65b3fa..223041a6eab78d0dfad960fff7c508488cf487fd 100644
--- a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/.ratings
+++ b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/.ratings
@@ -2,7 +2,7 @@ DiagramCoordinate.java 6b00aec99054d4cd19003a72bd4e5e774ac6a641 GREEN
 DiagramLayers.java aa1f95dbae290c8b00202abe4385b01b8f36e5ab GREEN
 DiagramViewer.java 537358db18da8b5ba2bf56082bfd87dec3ca88d8 GREEN
 DiagramViewerDefaultTags.java 6230763252409c60009ab8887b4ef582cf883229 GREEN
-DiagramViewerFeatures.java 3dd78d9c117fc156924a151c6f8d770c53c103bc GREEN
+DiagramViewerFeatures.java b48515b91e81cb07b405a92ab02925815f128ce9 GREEN
 DiagramViewerSelection.java e833f592543bc97077907d980a39b123fc4044e6 GREEN
 EDragGesture.java 5cfa098d3877db11981c2750e5e103156d62fc5e GREEN
 FeedbackChange.java b088fa89af648f1674f2f9c1f7f99d585ce801ca GREEN
diff --git a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/DiagramViewerFeatures.java b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/DiagramViewerFeatures.java
index 3dd78d9c117fc156924a151c6f8d770c53c103bc..b48515b91e81cb07b405a92ab02925815f128ce9 100644
--- a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/DiagramViewerFeatures.java
+++ b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/DiagramViewerFeatures.java
@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2019, 2020 fortiss GmbH. 
+ * Copyright (c) 2019, 2020, 2023 fortiss GmbH. 
  * 
  * This program and the accompanying materials are made available under the
  * terms of the Apache License, Version 2.0 which is available at
@@ -51,7 +51,9 @@ public final class DiagramViewerFeatures {
 	/** The flag for drawing the outer border, which occupies the first grid row and lane. */
 	private boolean drawOuterBorder = true;
 	/** The indicator type. */
-	private IndicatorType indicatorType = IndicatorType.CROSS;
+	private IndicatorType currentIndicatorType = IndicatorType.INVISIBLE;
+	/** The indicator type to be used, when enabling the grid. */
+	private IndicatorType defaultIndicatorType = IndicatorType.CROSS;
 	/** The background color. */
 	private Color backgroundColor = LIGHTGRAY;
 	/** The help text for the diagram viewer in-place help */
@@ -149,15 +151,20 @@ public final class DiagramViewerFeatures {
 
 	/** Returns the indicator type. */
 	public IndicatorType getIndicatorType() {
-		return indicatorType;
+		return currentIndicatorType;
 	}
 
 	/** Sets the indicator type. */
 	public void setIndicatorType(IndicatorType indicatorType) {
-		this.indicatorType = indicatorType;
+		this.currentIndicatorType = indicatorType;
 		viewer.updateAllVisuals();
 	}
 
+	/** Sets the displayed indicator type to the default value. */
+	public void setIndicatorTypeToDefault() {
+		setIndicatorType(defaultIndicatorType);
+	}
+
 	/** Returns the background color. */
 	public Color getBackgroundColor() {
 		return backgroundColor;
@@ -316,4 +323,14 @@ public final class DiagramViewerFeatures {
 	public void setHelpText(String helpText) {
 		this.helpText = helpText;
 	}
+
+	/** Retrieves the indicator type to be used, when enabling indicators. */
+	public IndicatorType getDefaultIndicatorType() {
+		return defaultIndicatorType;
+	}
+
+	/** Sets the indicator type to be used when enabling the grid. */
+	public void setDefaultIndicatorType(IndicatorType defaultIndicatorType) {
+		this.defaultIndicatorType = defaultIndicatorType;
+	}
 }
diff --git a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/.ratings b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/.ratings
index fdb866d1694b6cdb55edc61c1dc9832229c8fb44..82b1512af126fdc8e96230d33fe4cc95261e015d 100644
--- a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/.ratings
+++ b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/.ratings
@@ -2,7 +2,7 @@ AnchorageContentControllerBase.java da56b10cbf2711b5da69f0b59f43eacbe54f4eea GRE
 ClickControllerBase.java 8e5861ed5f9318008ad0fdd5497ed320cd5bd647 GREEN
 ContentAnchorageMoveControllerBase.java c18e7915ce23e124757f5b736086ecc46694800a GREEN
 ControllerBase.java 9311521b252e46640e26d409610e527fd5ed6922 GREEN
-DefaultDiagramController.java 3f60229b2e0fe0b6ac40c617858cc5a0685a59eb GREEN
+DefaultDiagramController.java f707d03674e42aacc7d5d8b3eb8d15b45add2004 GREEN
 DelegatingContentAnchorageController.java 1889628a346a2183082ffe213978f9d15a949494 GREEN
 DragControllerBase.java b15ff874304f679fe494d85f57cc8cbe4d0d1d15 GREEN
 DraggingUtils.java 95117e2ea4c36b6c6a31f8088bb95b484e0e6612 GREEN
diff --git a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/DefaultDiagramController.java b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/DefaultDiagramController.java
index 3f60229b2e0fe0b6ac40c617858cc5a0685a59eb..f707d03674e42aacc7d5d8b3eb8d15b45add2004 100644
--- a/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/DefaultDiagramController.java
+++ b/org.fortiss.tooling.common.ui/src/org/fortiss/tooling/common/ui/javafx/lwfxef/controller/base/DefaultDiagramController.java
@@ -34,9 +34,6 @@ public class DefaultDiagramController extends ControllerBase {
 	/** Flag for ignoring mouse click event after dragging gesture. */
 	private boolean ignoreNextMouseClick = false;
 
-	/** Previous grid indicator type (to restore grid after it has been hidden). */
-	private IndicatorType previousGridIndicatorType = null;
-
 	/** Constructor. */
 	public DefaultDiagramController(IMVCBundle mvcb) {
 		super(mvcb);
@@ -83,16 +80,13 @@ public class DefaultDiagramController extends ControllerBase {
 	private MenuItem createGridMenuItem(DiagramViewerFeatures features) {
 		MenuItem gridMenuItem = null;
 		if(features.getIndicatorType() == IndicatorType.INVISIBLE) {
-			if(previousGridIndicatorType != null) {
-				gridMenuItem = new MenuItem("Show Grid");
-				gridMenuItem.setOnAction(evt -> {
-					features.setIndicatorType(previousGridIndicatorType);
-				});
-			}
+			gridMenuItem = new MenuItem("Show Grid");
+			gridMenuItem.setOnAction(evt -> {
+				features.setIndicatorTypeToDefault();
+			});
 		} else {
 			gridMenuItem = new MenuItem("Hide Grid");
 			gridMenuItem.setOnAction(evt -> {
-				previousGridIndicatorType = features.getIndicatorType();
 				features.setIndicatorType(IndicatorType.INVISIBLE);
 			});
 		}
diff --git a/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/.ratings b/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/.ratings
index efc110735ce14601ff0f14ee9e94cf0f2cc62f45..a0504ca88c26217c2d516289c1f95dc33f29fc27 100644
--- a/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/.ratings
+++ b/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/.ratings
@@ -1,3 +1,3 @@
 CrossFeatureConstraintPropertySectionBase.java 37e772fb3471f85320170d373cbe2f319c350655 GREEN
-FeaturePropertySectionBase.java 598842b12b5bbb6f3cf2461a4d05fc721b637f54 GREEN
+FeaturePropertySectionBase.java 9b338ff5ab4c70179d406bc0d76b8c62a1dbc8ae GREEN
 HasPresenceConditionPropertySectionBase.java ef300f0d9294d76f5d80e45b8cc0d94c24586a24 GREEN
diff --git a/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/FeaturePropertySectionBase.java b/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/FeaturePropertySectionBase.java
index 598842b12b5bbb6f3cf2461a4d05fc721b637f54..9b338ff5ab4c70179d406bc0d76b8c62a1dbc8ae 100644
--- a/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/FeaturePropertySectionBase.java
+++ b/org.fortiss.tooling.ext.variability.ui/src/org/fortiss/tooling/ext/variability/ui/properties/FeaturePropertySectionBase.java
@@ -56,6 +56,7 @@ public class FeaturePropertySectionBase extends PropertySectionBase {
 				if(feature.eContainer() instanceof AbstractAlternativeFeature ||
 						feature instanceof AbstractFeatureModel) {
 					optionalCheckbox.setEnabled(false);
+					optionalCheckbox.setSelection(false);
 				} else {
 					optionalCheckbox.setEnabled(true);
 					optionalCheckbox.setSelection(feature.isOptional());
diff --git a/org.fortiss.variability/src/org/fortiss/variability/model/.ratings b/org.fortiss.variability/src/org/fortiss/variability/model/.ratings
index 21c8c4adb340b726f01f431432b90b55e2322124..4b54c831621b6bcf35f4ed0fc6eec363252d08ca 100644
--- a/org.fortiss.variability/src/org/fortiss/variability/model/.ratings
+++ b/org.fortiss.variability/src/org/fortiss/variability/model/.ratings
@@ -1,2 +1,2 @@
 VariabilityModelElementFactory.java 5a50d78b0fc94a20329b95991b519a3e3fbf4410 GREEN
-VariabilityStaticImpl.java d274310be2b110c002b3e514bc570fd5f4f6e48a GREEN
+VariabilityStaticImpl.java 96bc4364ebe635c94fafbd3ef60b8237b18c17c6 GREEN
diff --git a/org.fortiss.variability/src/org/fortiss/variability/model/VariabilityStaticImpl.java b/org.fortiss.variability/src/org/fortiss/variability/model/VariabilityStaticImpl.java
index d274310be2b110c002b3e514bc570fd5f4f6e48a..96bc4364ebe635c94fafbd3ef60b8237b18c17c6 100644
--- a/org.fortiss.variability/src/org/fortiss/variability/model/VariabilityStaticImpl.java
+++ b/org.fortiss.variability/src/org/fortiss/variability/model/VariabilityStaticImpl.java
@@ -30,6 +30,7 @@ import org.eclipse.emf.ecore.EObject;
 import org.fortiss.variability.model.base.RemoveBindingStrategy;
 import org.fortiss.variability.model.features.AbstractAlternativeFeature;
 import org.fortiss.variability.model.features.AbstractFeature;
+import org.fortiss.variability.model.features.AbstractFeatureModel;
 import org.fortiss.variability.model.features.configuration.AlternativeFeatureConfiguration;
 import org.fortiss.variability.model.features.configuration.CompositionalFeatureConfiguration;
 import org.fortiss.variability.model.features.configuration.IFeatureConfiguration;
@@ -327,6 +328,10 @@ public class VariabilityStaticImpl {
 			return false;
 		}
 
+		if(target instanceof AbstractFeatureModel) {
+			return subject == target;
+		}
+
 		return target.getClass() == subject.getClass() &&
 				((AbstractFeature)target).getName().equals(subject.getName());
 	}