The RadGauge offers a design-time support since its creation. The advanced features are accessed through the Smart Tag of the control by clicking on the Configuration Manager link.
The basic functionality is similar to what other Telerik controls offer:
Currently the layout configuration the RadGauge offers is its size. It is an important property when adjusting the real estate on the page and it is available in the root of the Smart Tag just below the configuration manager.
The Add RadAjaxManager... link adds a RadAjaxManager component to your Web page,so you can configure partial postbacks through a comfortable control.
The Replace ScriptManager with RadScriptManager link replaces the default ScriptManager component that is used for AJAX-enabled Web sites with RadScriptManager. If there isn't a ScriptManager on the page this link will allow you to add one.
The AddRadStyleSheetManager link adds a RadStyleSheetManager to your Web page.
The Skin dropdown lists all available skins for the control so you can select one that matches the look and feel of the rest of the page.The skins are displayed via small images to give you a better idea of the color scheme they use.
The last section of the Smart Tag provides several links navigate you directly to the RadGauge online examples, help, or code library.