You can specify the pages theme
at three levels:
- Web configuration
- Master pages
- Aspx Pages
So, if you want to set a global theme for the site, you should declare it in the Web.config file within the configuration/system.web section:
Then set Theme property of the pages to [No Theme].
Unfortunately, this wont work in Sitefinity 3.0 Beta 2, because of a bug: when you set the Theme property of the page to [No Theme], it overrides the page theme to empty string.
This issue will be fixed in the next release. We are sorry for the inconvenience.