Your theme controls the look and feel of your Web site pages. When you select a theme at the site level, all of your pages will use that theme. However, you can select a different theme at the group level. You can also modify your theme properties, although the properties will vary based on the theme you are using and, if applicable, CSS.
To select a site theme:
Navigate to Control Panel Dashboard > System Administration > Site Administration > Site Content > Site Theme.
Select your desired theme from the Select Site Theme drop-down list. The list includes any themes your developers have created. (The default theme for Telligent Enterprise is Evolution2.) The configurable properties display on the theme tabs. (Read more about common configurable theme properties...)
After you modify the theme properties, you can see what your pages will look like before you apply the modified properties by selecting the Preview tab and clicking Enter Preview Mode.
Click Save to retain your modified theme properties.
See Customize with themes for more information about theme options.