Sitefinity does not provide an editor for themes. But you could modify the themes through Visual Studio. All the themes are available under ~/App_Themes
folder in your Sitefinity-managed Web site:
1. Launch Microsoft Visual Studio.
2. Select File
> Web Site
3. Select File System
from the choices on the left.
4. Browse to the folder where your site is and click Open
5. In the Solution Explorer, right-click the App_Themes
folder and open the .css
file of the theme you need to change.
For details please refer to the following article: ASP.NET Themes and Skins
the Telerik team