# Skins

To make customizing the appearance of **RadToolTip** and **RadToolTipManager** as easy as possible, these controls use **skins.** A skin is a set of images and a CSS stylesheet that are applied to the HTML elements which make up the tooltip, defining the look and feel.

To apply a skin, set the **Skin** property of the **RadToolTip** or **RadToolTipManager** control. You can set the **Skin** property using the properties pane or the control's [Smart Tag](https://www.telerik.com/products/aspnet-ajax/documentation/controls/tooltip/design-time/smart-tag).

**RadToolTip** is installed with a number of predefined skins:

![radtooltip-skins](https://www.telerik.com/products/aspnet-ajax/documentation/assets/de926d41e0aadb4686e9f453f583f8b8/tooltip-skins.png)

> note The **Material** skin is available for the [Lightweight RenderMode](https://docs.telerik.com/devtools/aspnet-ajax/controls/render-modes) only. If you experience visual issues with it, make sure your controls are not using the default Classic mode.

## See Also

* [Smart Tag](https://www.telerik.com/products/aspnet-ajax/documentation/controls/tooltip/design-time/smart-tag)
* [Telerik ThemeBuilder for ASP.NET AJAX](https://themebuilder.telerik.com/)