diff --git a/platform/platform-api/resources/messages/IdeBundle.properties b/platform/platform-api/resources/messages/IdeBundle.properties
index 914753372b38..a30fea9ce62b 100644
--- a/platform/platform-api/resources/messages/IdeBundle.properties
+++ b/platform/platform-api/resources/messages/IdeBundle.properties
@@ -1867,6 +1867,7 @@ notification.title.desktop.entry.created=Desktop entry created
 link.cancel=Cancel
 dialog.title.customize.0=Customize {0}
 button.back=Back
+dialog.apply=Apply
 
 github.project.generator.version=&Version:
 github.project.generator.versions.not.loaded.error=Versions have not been loaded yet.
diff --git a/platform/platform-impl/api-dump-unreviewed.txt b/platform/platform-impl/api-dump-unreviewed.txt
index 834ac7864cbb..9b97addc3082 100644
--- a/platform/platform-impl/api-dump-unreviewed.txt
+++ b/platform/platform-impl/api-dump-unreviewed.txt
@@ -9335,6 +9335,7 @@ c:com.intellij.ide.ui.customization.CustomizableActionsPanel
 - p:getRestoreGroup():com.intellij.openapi.actionSystem.ActionGroup
 - isModified():Z
 - p:needExpandAll():Z
+- p:onModified():V
 - p:patchActionsTreeCorrespondingToSchema(javax.swing.tree.DefaultMutableTreeNode):V
 - reset():V
 - resetToDefaults():V
diff --git a/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizableActionsPanel.java b/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizableActionsPanel.java
index 47397aa20e3a..2b7d75f52c9e 100644
--- a/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizableActionsPanel.java
+++ b/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizableActionsPanel.java
@@ -94,6 +94,7 @@ public class CustomizableActionsPanel {
 
     ActionToolbarImpl addGroupToolbar = (ActionToolbarImpl)ActionManager.getInstance()
       .createActionToolbar(ActionPlaces.TOOLBAR, new DefaultActionGroup(new AddActionActionTreeSelectionAction()), true);
+    addGroupToolbar.setTargetComponent(myPanel);
     addGroupToolbar.setActionButtonBorder(new JBEmptyBorder(0));
     addGroupToolbar.setBorder(new JBEmptyBorder(0));
     container.add(addGroupToolbar, BorderLayout.WEST);
@@ -168,6 +169,7 @@ public class CustomizableActionsPanel {
 
   private void addCustomizedAction(ActionUrl url) {
     mySelectedSchema.addAction(url);
+    onModified();
   }
 
   private static boolean isMoveSupported(JTree tree, int dir) {
@@ -262,8 +264,11 @@ public class CustomizableActionsPanel {
     }
     TreeUtil.selectPaths(myActionsTree, toTreePaths(root, selectedIds));
     TreeUtil.ensureSelection(myActionsTree);
+    onModified();
   }
 
+  protected void onModified() { }
+
   private static List<String> toActionIDs(List<? extends TreePath> paths) {
     return ContainerUtil.map(paths, path -> getActionId((DefaultMutableTreeNode)path.getLastPathComponent()));
   }
@@ -282,7 +287,13 @@ public class CustomizableActionsPanel {
   }
 
   public boolean isModified() {
-    CustomizationUtil.optimizeSchema(myActionsTree, mySelectedSchema);
+    return isModified(true);
+  }
+
+  boolean isModified(boolean optimized) {
+    if (optimized) {
+      CustomizationUtil.optimizeSchema(myActionsTree, mySelectedSchema);
+    }
     return CustomActionsSchema.getInstance().isModified(mySelectedSchema);
   }
 
@@ -292,6 +303,7 @@ public class CustomizableActionsPanel {
       mySelectedSchema.fillCorrectedActionGroups(root);
     }
     ((DefaultTreeModel)myActionsTree.getModel()).reload();
+    onModified();
   }
 
   private static final class TreePathStringFunction implements Function<TreePath, String> {
@@ -1044,6 +1056,7 @@ public class CustomizableActionsPanel {
       final List<TreePath> treePaths = TreeUtil.collectExpandedPaths(myActionsTree);
       patchActionsTreeCorrespondingToSchema((DefaultMutableTreeNode)myActionsTree.getModel().getRoot());
       restorePathsAfterTreeOptimization(treePaths);
+      onModified();
     }
 
     @Override
diff --git a/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizationUtil.java b/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizationUtil.java
index a7821698b3c4..4d586e1a106d 100644
--- a/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizationUtil.java
+++ b/platform/platform-impl/src/com/intellij/ide/ui/customization/CustomizationUtil.java
@@ -23,6 +23,8 @@ import com.intellij.openapi.ui.JBPopupMenu;
 import com.intellij.openapi.util.*;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.openapi.util.text.Strings;
+import com.intellij.openapi.wm.IdeFrame;
+import com.intellij.openapi.wm.WindowManager;
 import com.intellij.ui.ClientProperty;
 import com.intellij.ui.PopupHandler;
 import com.intellij.ui.PopupMenuListenerAdapter;
@@ -46,11 +48,10 @@ import javax.swing.tree.DefaultTreeModel;
 import javax.swing.tree.TreeNode;
 import javax.swing.tree.TreePath;
 import java.awt.*;
+import java.awt.event.ActionEvent;
 import java.awt.event.MouseListener;
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
-import java.util.Objects;
+import java.util.*;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.function.Supplier;
@@ -575,13 +576,33 @@ public final class CustomizationUtil {
       }
 
       @Override
-      protected void doOKAction() {
+      protected Action @NotNull [] createActions() {
+        List<Action> actions = new ArrayList<>(Arrays.asList(super.createActions()));
+        Action applyAction = new DialogWrapperAction(IdeBundle.message("dialog.apply")) {
+          @Override
+          protected void doAction(ActionEvent e) {
+            apply();
+            setEnabled(false);
+          }
+        };
+        actions.add(applyAction);
+        panel.setApplyAction(applyAction);
+
+        return actions.toArray(Action[]::new);
+      }
+
+      private void apply() {
         try {
           panel.apply();
         }
         catch (ConfigurationException ex) {
           LOG.error(ex);
         }
+      }
+
+      @Override
+      protected void doOKAction() {
+        apply();
         close(OK_EXIT_CODE);
       }
 
@@ -606,12 +627,56 @@ public final class CustomizationUtil {
   private static final class ToolbarCustomizableActionsPanel extends CustomizableActionsPanel {
     private final @NotNull String myGroupID;
     private final @Nls @NotNull String myGroupName;
+    private @Nullable Action myApplyAction;
 
     private ToolbarCustomizableActionsPanel(@NotNull String groupID, @Nls @NotNull String groupName) {
       myGroupID = groupID;
       myGroupName = groupName;
     }
 
+    @Override
+    public void apply() throws ConfigurationException {
+      super.apply();
+      updateActionToolbars();
+      onModified();
+    }
+
+    private void setApplyAction(@Nullable Action applyAction) {
+      this.myApplyAction = applyAction;
+      if (applyAction != null) {
+        applyAction.setEnabled(isModified(false));
+      }
+    }
+
+    private void updateActionToolbars() {
+      HashSet<String> editedChildrenSet = new HashSet<>();
+      if (ActionManager.getInstance().getAction(myGroupID) instanceof ActionGroup group) {
+        editedChildrenSet.addAll(Arrays.stream(group.getChildren(null)).map(action -> {
+          return ActionManager.getInstance().getId(action);
+        }).toList());
+      }
+
+      for (IdeFrame frame: WindowManager.getInstance().getAllProjectFrames()) {
+        for (Component c : UIUtil.uiTraverser(frame.getComponent()).traverse()) {
+          if (c instanceof ActionToolbar toolbar) {
+            AnAction foundGroup = ActionUtil.getDelegateChainRootAction(toolbar.getActionGroup());
+
+            String foundId = ActionManager.getInstance().getId(foundGroup);
+            if (myGroupID.equals(foundId) || editedChildrenSet.contains(foundId)) {
+              toolbar.updateActionsAsync();
+            }
+          }
+        }
+      }
+    }
+
+    @Override
+    protected void onModified() {
+      if (myApplyAction != null) {
+        myApplyAction.setEnabled(CustomActionsSchema.getInstance().isModified(mySelectedSchema));
+      }
+    }
+
     @Override
     protected @NotNull ActionGroup getRestoreGroup() {
       return new DefaultActionGroup(new DumbAwareAction(IdeBundle.messagePointer("button.restore.last.state")) {