# Elements

Expander comprises three elements – the header, the expander and the content panel. Learn more about the elements in Expander for WPF documentation.

## Content



The Expander control comprises three elements – the header, the expand icon and the content area. Let us get into the visual and descriptive overview of the elements that comprise the complete **Expander** control.

The Expander control looks similar to the image below:

![Elements of the WPF Expander control](https://cdn.mescius.io/document-site-files/images/530ec557-536d-4b6e-94ca-c0cf743e2c3a/images/expander-elements.png)

The description of these elements is as follows:

*   **Header** - The header element appears at the top of the Expander control.
*   **Expand Icon** - The expand icon appears on the right side of the header, by default.
*   **Content Area** - The content area is an empty area where you can add grids, text, images, and arbitrary controls.