diff --git a/packages/devextreme-vue/src/scheduler.ts b/packages/devextreme-vue/src/scheduler.ts
index a8bcca7114cc..ead3818f5f1b 100644
--- a/packages/devextreme-vue/src/scheduler.ts
+++ b/packages/devextreme-vue/src/scheduler.ts
@@ -120,7 +120,6 @@ import {
  ShowTextMode,
 } from "devextreme/ui/toolbar";
 import {
- dxButtonGroupOptions,
  dxButtonGroupItem,
  ContentReadyEvent as ButtonGroupContentReadyEvent,
  DisposingEvent as ButtonGroupDisposingEvent,
@@ -1006,7 +1005,7 @@ const DxItemConfig = {
     location: String as PropType<ToolbarItemLocation>,
     menuItemTemplate: {},
     name: String as PropType<string | FormPredefinedButtonItem | SchedulerPredefinedToolbarItem>,
-    options: Object as PropType<DateNavigatorItemProperties | Record<string, any> | dxButtonGroupOptions>,
+    options: Object as PropType<DateNavigatorItemProperties | Record<string, any>>,
     showText: String as PropType<ShowTextMode>,
     tabPanelOptions: Object as PropType<dxTabPanelOptions | Record<string, any>>,
     tabs: Array as PropType<Array<Record<string, any>>>,
@@ -1704,7 +1703,7 @@ const DxToolbarItemConfig = {
     location: String as PropType<ToolbarItemLocation>,
     menuItemTemplate: {},
     name: String as PropType<SchedulerPredefinedToolbarItem>,
-    options: Object as PropType<DateNavigatorItemProperties | Record<string, any> | dxButtonGroupOptions>,
+    options: Object as PropType<DateNavigatorItemProperties | Record<string, any>>,
     showText: String as PropType<ShowTextMode>,
     template: {},
     text: String,
diff --git a/packages/devextreme/js/ui/scheduler.d.ts b/packages/devextreme/js/ui/scheduler.d.ts
index e7bcc32063fd..873671a3fbe5 100644
--- a/packages/devextreme/js/ui/scheduler.d.ts
+++ b/packages/devextreme/js/ui/scheduler.d.ts
@@ -24,7 +24,10 @@ import {
   PointerInteractionEvent,
 } from '../events';
 
-import { dxButtonGroupOptions, dxButtonGroupItem } from './button_group';
+import {
+  Properties as ButtonGroupProperties,
+  Item as ButtonGroupItem,
+} from './button_group';
 import {
   CollectionWidgetItem,
 } from './collection/ui.collection_widget.base';
@@ -35,7 +38,7 @@ import dxForm, { Properties as FormProperties } from './form';
 import dxPopup, { Properties as PopupProperties } from './popup';
 
 import dxSortable from './sortable';
-import { dxToolbarItem } from './toolbar';
+import { Item as ToolbarItemBase } from './toolbar';
 
 import Widget, {
   WidgetOptions,
@@ -56,12 +59,10 @@ interface AppointmentDraggingEvent {
 export interface TargetedAppointmentInfo {
   /**
    * @docid
-   * @type dxSchedulerAppointment
    */
   readonly appointmentData: Appointment;
   /**
    * @docid
-   * @type dxSchedulerAppointment
    */
   readonly targetedAppointmentData?: Appointment;
 }
@@ -115,7 +116,6 @@ export type SchedulerPredefinedDateNavigatorItem = 'prev' | 'next' | 'dateInterv
 export type AppointmentAddedEvent = EventInfo<dxScheduler> & {
   /**
    * @docid _ui_scheduler_AppointmentAddedEvent.appointmentData
-   * @type dxSchedulerAppointment
    */
   readonly appointmentData: Appointment;
   /** @docid _ui_scheduler_AppointmentAddedEvent.error */
@@ -131,12 +131,10 @@ export type AppointmentAddedEvent = EventInfo<dxScheduler> & {
 export type AppointmentAddingEvent = EventInfo<dxScheduler> & {
   /**
    * @docid _ui_scheduler_AppointmentAddingEvent.appointmentData
-   * @type dxSchedulerAppointment
    */
   readonly appointmentData: Appointment;
   /**
    * @docid _ui_scheduler_AppointmentAddingEvent.cancel
-   * @type Boolean|Promise<Boolean>
    */
   cancel: boolean | PromiseLike<boolean>;
 };
@@ -183,7 +181,6 @@ export type AppointmentDblClickEvent = Cancelable & NativeEventInfo<dxScheduler,
 export type AppointmentDeletedEvent = EventInfo<dxScheduler> & {
   /**
    * @docid _ui_scheduler_AppointmentDeletedEvent.appointmentData
-   * @type dxSchedulerAppointment
    */
   readonly appointmentData: Appointment;
   /** @docid _ui_scheduler_AppointmentDeletedEvent.error */
@@ -199,12 +196,10 @@ export type AppointmentDeletedEvent = EventInfo<dxScheduler> & {
 export type AppointmentDeletingEvent = EventInfo<dxScheduler> & {
   /**
    * @docid _ui_scheduler_AppointmentDeletingEvent.appointmentData
-   * @type dxSchedulerAppointment
    */
   readonly appointmentData: Appointment;
   /**
    * @docid _ui_scheduler_AppointmentDeletingEvent.cancel
-   * @type Boolean|Promise<Boolean>
    */
   cancel: boolean | PromiseLike<boolean>;
 };
@@ -218,7 +213,6 @@ export type AppointmentDeletingEvent = EventInfo<dxScheduler> & {
 export type AppointmentFormOpeningEvent = Cancelable & EventInfo<dxScheduler> & {
   /**
    * @docid _ui_scheduler_AppointmentFormOpeningEvent.appointmentData
-   * @type dxSchedulerAppointment
    */
   readonly appointmentData?: Appointment;
   /** @docid _ui_scheduler_AppointmentFormOpeningEvent.form */
@@ -248,7 +242,6 @@ export type AppointmentTooltipShowingEvent = Cancelable & EventInfo<dxScheduler>
   readonly targetElement: DxElement;
   /**
    * @docid _ui_scheduler_AppointmentTooltipShowingEvent.appointments
-   * @type Array<object>
    */
   readonly appointments: AppointmentTooltipShowingAppointmentInfo[];
 };
@@ -273,7 +266,6 @@ export type AppointmentRenderedEvent = EventInfo<dxScheduler> & TargetedAppointm
 export type AppointmentUpdatedEvent = EventInfo<dxScheduler> & {
   /**
    * @docid _ui_scheduler_AppointmentUpdatedEvent.appointmentData
-   * @type dxSchedulerAppointment
    */
   readonly appointmentData: Appointment;
   /** @docid _ui_scheduler_AppointmentUpdatedEvent.error */
@@ -289,17 +281,14 @@ export type AppointmentUpdatedEvent = EventInfo<dxScheduler> & {
 export type AppointmentUpdatingEvent = EventInfo<dxScheduler> & {
   /**
    * @docid _ui_scheduler_AppointmentUpdatingEvent.oldData
-   * @type Object
    */
   readonly oldData: any;
   /**
    * @docid _ui_scheduler_AppointmentUpdatingEvent.newData
-   * @type Object
    */
   readonly newData: any;
   /**
    * @docid _ui_scheduler_AppointmentUpdatingEvent.cancel
-   * @type Boolean|Promise<Boolean>
    */
   cancel?: boolean | PromiseLike<boolean>;
 };
@@ -442,7 +431,6 @@ export type AppointmentCollectorTemplateData = {
   readonly appointmentCount: number;
   /**
    * @docid
-   * @type Array<dxSchedulerAppointment>
    */
   readonly items: Appointment[];
   /**
@@ -463,7 +451,10 @@ export type DateNavigatorTextInfo = {
  * @namespace DevExpress.ui
  * @docid
  */
-export interface dxSchedulerOptions extends WidgetOptions<dxScheduler> {
+export interface dxSchedulerOptions extends Omit<
+  WidgetOptions<dxScheduler>,
+  'onContentReady' | 'onDisposing' | 'onInitialized' | 'onOptionChanged'
+> {
     /**
      * @docid
      * @default false
@@ -878,6 +869,34 @@ export interface dxSchedulerOptions extends WidgetOptions<dxScheduler> {
      * @public
      */
     onCellContextMenu?: ((e: CellContextMenuEvent) => void) | string;
+    /**
+     * @docid
+     * @public
+     * @type_function_param1 e:{ui/scheduler:ContentReadyEvent}
+     * @action
+     */
+    onContentReady?: (e: ContentReadyEvent) => void;
+    /**
+     * @docid
+     * @public
+     * @type_function_param1 e:{ui/scheduler:DisposingEvent}
+     * @action
+     */
+    onDisposing?: (e: DisposingEvent) => void;
+    /**
+     * @docid
+     * @public
+     * @type_function_param1 e:{ui/scheduler:InitializedEvent}
+     * @action
+     */
+    onInitialized?: (e: InitializedEvent) => void;
+    /**
+     * @docid
+     * @public
+     * @type_function_param1 e:{ui/scheduler:OptionChangedEvent}
+     * @action
+     */
+    onOptionChanged?: (e: OptionChangedEvent) => void;
     /**
      * @docid
      * @default "dialog"
@@ -1206,17 +1225,18 @@ export interface dxSchedulerOptions extends WidgetOptions<dxScheduler> {
 
 /**
  * @docid
+ * @type object
  * @inherits dxButtonGroupOptions
  * @namespace DevExpress.ui.dxScheduler
  * @public
  */
-export type DateNavigatorItemProperties = dxButtonGroupOptions & {
+export type DateNavigatorItemProperties = ButtonGroupProperties & {
   /**
    * @docid
    * @type Array<dxButtonGroupItem,Enums.SchedulerPredefinedDateNavigatorItem>
    * @public
    */
-  items: Array<dxButtonGroupItem | SchedulerPredefinedDateNavigatorItem>;
+  items: Array<ButtonGroupItem | SchedulerPredefinedDateNavigatorItem>;
 };
 
 /**
@@ -1231,7 +1251,7 @@ export type dxSchedulerToolbarItem = ToolbarItem;
  * @namespace DevExpress.ui.dxScheduler
  * @public
  */
-export type ToolbarItem = dxToolbarItem & {
+export type ToolbarItem = ToolbarItemBase & {
   /**
    * @docid dxSchedulerToolbarItem.name
    * @public
@@ -1293,25 +1313,22 @@ export type Toolbar = {
  * @namespace DevExpress.ui
  * @public
  */
-export default class dxScheduler extends Widget<dxSchedulerOptions> {
+export default class dxScheduler extends Widget<Properties> {
     /**
      * @docid
      * @publicName addAppointment(appointment)
-     * @param1 appointment:dxSchedulerAppointment
      * @public
      */
     addAppointment(appointment: Appointment): void;
     /**
      * @docid
      * @publicName deleteAppointment(appointment)
-     * @param1 appointment:dxSchedulerAppointment
      * @public
      */
     deleteAppointment(appointment: Appointment): void;
     /**
      * @docid
      * @publicName deleteRecurrence(appointment, date, recurrenceEditMode)
-     * @param1 appointmentData:dxSchedulerAppointment
      * @public
      */
     deleteRecurrence(
@@ -1329,7 +1346,6 @@ export default class dxScheduler extends Widget<dxSchedulerOptions> {
     /**
      * @docid
      * @publicName getOccurrences(startDate, endDate, appointments)
-     * @param3 appointments:Array<dxSchedulerAppointment>
      * @public
      */
     getOccurrences(startDate: Date, endDate: Date, appointments: Appointment[]): Occurrence[];
@@ -1342,7 +1358,6 @@ export default class dxScheduler extends Widget<dxSchedulerOptions> {
     /**
      * @docid
      * @publicName hideAppointmentPopup(saveChanges)
-     * @param1 saveChanges:Boolean|undefined
      * @public
      */
     hideAppointmentPopup(saveChanges?: boolean): void;
@@ -1355,10 +1370,6 @@ export default class dxScheduler extends Widget<dxSchedulerOptions> {
     /**
      * @docid
      * @publicName scrollTo(date, options)
-     * @param2 options:Object|undefined
-     * @param2_field group:Object|undefined
-     * @param2_field allDay:Boolean|undefined
-     * @param2_field alignInView:Enums.SchedulerScrollToAlign|undefined
      * @public
      */
     scrollTo(date: Date, options?: {
@@ -1369,8 +1380,6 @@ export default class dxScheduler extends Widget<dxSchedulerOptions> {
     /**
      * @docid
      * @publicName scrollTo(date, group, allDay)
-     * @param2 group:Object|undefined
-     * @param3 allDay:Boolean|undefined
      * @public
      * @deprecated
      */
@@ -1378,26 +1387,18 @@ export default class dxScheduler extends Widget<dxSchedulerOptions> {
     /**
      * @docid
      * @publicName showAppointmentPopup(appointmentData, createNewAppointment, currentAppointmentData)
-     * @param1 appointmentData:dxSchedulerAppointment|undefined
-     * @param2 createNewAppointment:Boolean|undefined
-     * @param3 currentAppointmentData:dxSchedulerAppointment|undefined
      * @public
      */
     showAppointmentPopup(appointmentData?: Appointment, createNewAppointment?: boolean, currentAppointmentData?: Appointment): void;
     /**
      * @docid
      * @publicName showAppointmentTooltip(appointmentData, target, currentAppointmentData)
-     * @param1 appointmentData:dxSchedulerAppointment
-     * @param2 target:string|Element|jQuery
-     * @param3 currentAppointmentData:dxSchedulerAppointment|undefined
      * @public
      */
     showAppointmentTooltip(appointmentData: Appointment, target: string | UserDefinedElement, currentAppointmentData?: Appointment): void;
     /**
      * @docid
      * @publicName updateAppointment(target, appointment)
-     * @param1 target:dxSchedulerAppointment
-     * @param2 appointment:dxSchedulerAppointment
      * @public
      */
     updateAppointment(target: Appointment, appointment: Appointment): void;
@@ -1504,7 +1505,6 @@ export type Occurrence = {
   /**
    * @docid
    * @public
-   * @type dxSchedulerAppointment
    */
   appointmentData: Appointment;
 };
@@ -1525,38 +1525,3 @@ export interface dxSchedulerScrolling {
    */
   mode?: ScrollMode;
 }
-
-/// #DEBUG
-// eslint-disable-next-line import/first
-import { CheckedEvents } from '../core';
-
-type FilterOutHidden<T> = Omit<T, 'onFocusIn' | 'onFocusOut'>;
-
-type EventsIntegrityCheckingHelper = CheckedEvents<FilterOutHidden<Properties>, Required<Events>, 'onAppointmentAdded' | 'onAppointmentAdding' | 'onAppointmentClick' | 'onAppointmentContextMenu' | 'onAppointmentDblClick' | 'onAppointmentDeleted' | 'onAppointmentDeleting' | 'onAppointmentFormOpening' | 'onAppointmentRendered' | 'onAppointmentTooltipShowing' | 'onAppointmentUpdated' | 'onAppointmentUpdating' | 'onCellClick' | 'onCellContextMenu' | 'onSelectionEnd'>;
-
-/**
-* @hidden
-*/
-type Events = {
-/**
- * @docid dxSchedulerOptions.onContentReady
- * @type_function_param1 e:{ui/scheduler:ContentReadyEvent}
- */
-onContentReady?: ((e: ContentReadyEvent) => void);
-/**
- * @docid dxSchedulerOptions.onDisposing
- * @type_function_param1 e:{ui/scheduler:DisposingEvent}
- */
-onDisposing?: ((e: DisposingEvent) => void);
-/**
- * @docid dxSchedulerOptions.onInitialized
- * @type_function_param1 e:{ui/scheduler:InitializedEvent}
- */
-onInitialized?: ((e: InitializedEvent) => void);
-/**
- * @docid dxSchedulerOptions.onOptionChanged
- * @type_function_param1 e:{ui/scheduler:OptionChangedEvent}
- */
-onOptionChanged?: ((e: OptionChangedEvent) => void);
-};
-/// #ENDDEBUG
diff --git a/packages/devextreme/ts/dx.all.d.ts b/packages/devextreme/ts/dx.all.d.ts
index d915f281adee..dd026af3c5ff 100644
--- a/packages/devextreme/ts/dx.all.d.ts
+++ b/packages/devextreme/ts/dx.all.d.ts
@@ -26242,7 +26242,7 @@ declare module DevExpress.ui {
   /**
    * [descr:dxScheduler]
    */
-  export class dxScheduler extends Widget<dxSchedulerOptions> {
+  export class dxScheduler extends Widget<DevExpress.ui.dxScheduler.Properties> {
     /**
      * [descr:dxScheduler.addAppointment(appointment)]
      */
@@ -26779,7 +26779,11 @@ declare module DevExpress.ui {
    * @deprecated [depNote:dxSchedulerOptions]
    * @deprecated Attention! This type is for internal purposes only. If you used it previously, please submit a ticket to our {@link https://supportcenter.devexpress.com/ticket/create Support Center}. We will check if there is an alternative solution.
    */
-  export interface dxSchedulerOptions extends WidgetOptions<dxScheduler> {
+  export interface dxSchedulerOptions
+    extends Omit<
+      WidgetOptions<dxScheduler>,
+      'onContentReady' | 'onDisposing' | 'onInitialized' | 'onOptionChanged'
+    > {
     /**
      * [descr:dxSchedulerOptions.adaptivityEnabled]
      */
@@ -27110,6 +27114,22 @@ declare module DevExpress.ui {
     onCellContextMenu?:
       | ((e: DevExpress.ui.dxScheduler.CellContextMenuEvent) => void)
       | string;
+    /**
+     * [descr:dxSchedulerOptions.onContentReady]
+     */
+    onContentReady?: (e: DevExpress.ui.dxScheduler.ContentReadyEvent) => void;
+    /**
+     * [descr:dxSchedulerOptions.onDisposing]
+     */
+    onDisposing?: (e: DevExpress.ui.dxScheduler.DisposingEvent) => void;
+    /**
+     * [descr:dxSchedulerOptions.onInitialized]
+     */
+    onInitialized?: (e: DevExpress.ui.dxScheduler.InitializedEvent) => void;
+    /**
+     * [descr:dxSchedulerOptions.onOptionChanged]
+     */
+    onOptionChanged?: (e: DevExpress.ui.dxScheduler.OptionChangedEvent) => void;
     /**
      * [descr:dxSchedulerOptions.recurrenceEditMode]
      */
@@ -35012,12 +35032,15 @@ declare module DevExpress.ui.dxScheduler {
   /**
    * [descr:DateNavigatorItemProperties]
    */
-  export type DateNavigatorItemProperties = dxButtonGroupOptions & {
-    /**
-     * [descr:DateNavigatorItemProperties.items]
-     */
-    items: Array<dxButtonGroupItem | SchedulerPredefinedDateNavigatorItem>;
-  };
+  export type DateNavigatorItemProperties =
+    DevExpress.ui.dxButtonGroup.Properties & {
+      /**
+       * [descr:DateNavigatorItemProperties.items]
+       */
+      items: Array<
+        DevExpress.ui.dxButtonGroup.Item | SchedulerPredefinedDateNavigatorItem
+      >;
+    };
   /**
    * [descr:dxSchedulerToolbar]
    */
@@ -35042,7 +35065,7 @@ declare module DevExpress.ui.dxScheduler {
   /**
    * [descr:dxSchedulerToolbarItem]
    */
-  export type ToolbarItem = dxToolbarItem & {
+  export type ToolbarItem = DevExpress.ui.dxToolbar.Item & {
     /**
      * [descr:dxSchedulerToolbarItem.name]
      */