C1Expander includes themes allowing you to easily change the control's appearance. The control includes several built-in themes allowing you to customize the control's appearance to your application. You can easily change themes from the C1Expander Tasks menu, from the Properties window, and in code. For more information on changing Visual Styles see the Setting the Theme topic.

The following themes are included in Expander for ASP.NET Web Forms:

Visual Style	Expanded Preview	Collapsed Preview
arctic
aristo
cobalt
midnight
rocket
sterling