# Merging | WPF Controls | DevExpress Documentation

## Overview

Bars and Ribbon both support the **merging** feature.

**Merging** can be used in MDI applications, where both main and child windows have their own bars or ribbons. When a child window is maximized, its bar items are combined with bar items of a parent window.

The following animation demonstrates the **ribbon merging** feature.

![DXRibbon merging GIF](/WPF/images/dxribbon-merging-gif15114.gif)

## Further Reading

The following topics describe the **merging** feature in detail.

- [MDI Bar Merging](/WPF/9155/controls-and-libraries/layout-management/dock-windows/mdi-bar-merging)
- [MDI Ribbon Merging](/WPF/10587/controls-and-libraries/ribbon-bars-and-menu/ribbon/features/mdi-ribbon-merging)