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Apache Struts 2 Documentation
Selecting Themes
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Themes can be selected using several different rules, in this order:

1. The `theme` attribute on the specific tag
2. The `theme` attribute on a tag's surrounding form tag
3. The page-scoped attribute named "theme"
4. The request-scoped attribute named "theme"
5. The session-scoped attribute named "theme"
6. The application-scoped attribute named "theme"
7. The `struts.ui.theme` property in struts.properties (defaults to xhtml)

See "Can I change theme on a per-page basis" page for using scoped "theme" attribute.

## Tips

- To override an entire form's theme, change the "theme" attribute of the form. (Convenient for using the ajax theme for specific forms, for example.)
- To support user-selected themes, set the theme in the user's session.
- To change the theme for the entire application, modify the struts.properties.