# Expander Features

## Content



**Expander for Silverlight** allows you to create customized, rich applications. Make the most of **Expander for Silverlight** by taking advantage of the following key features:

*   **Expand on Page Load**
    

You can choose whether or not the [C1Expander](/componentone/api/wpf/online-extended/dotnet-framework-api/C1.WPF.Extended.4.6.2/C1.WPF.Extended.C1Expander.html) control is expanded upon page load by using the [C1Expander.IsExpanded](/componentone/api/wpf/online-extended/dotnet-framework-api/C1.WPF.Extended.4.6.2/C1.WPF.Extended.C1Expander.IsExpanded.html) property. By default, the **IsExpanded** property is set to **True** and the control is initially appears expanded. For more information, see the [Expandability](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/Expandability)|document=Documents\\SilverlightExpander.doc;topic=Expandability topic.

*   **Expand Direction**
    

The **C1Expander** control has the ability to expand in four different directions. The [C1Expander.ExpandDirection](/componentone/api/wpf/online-extended/dotnet-framework-api/C1.WPF.Extended.4.6.2/C1.WPF.Extended.C1Expander.ExpandDirection.html) property indicated in which direction the control expands and can be set to **Top**, **Right**, **Bottom**, or **Left**. For more information, see the [ExpandDirection](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/ExpandDirection2)|document=Documents\\SilverlightAccordion.doc;topic=Expand Direction topic.

*   **Custom Header**
    

The **C1Expander** control's header can be customized with both text and controls. For more information on the customizable header element, see [Expander Header](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl/ExpanderHeader)|document=Documents\\SilverlightExpander.doc;topic=Expander Header.

*   **Configure Items in an Organized Pattern**
    

Expander is designed to maximize space. Configure the size and position of **C1Expander** to hide items until needed.

## See Also

[Working with the C1Expander Control](/componentone/docs/wpf/online-extended/Expander/ExpanderFeatures/WorkingwiththeC1ExpanderControl)