| --- |
| layout: default |
| title: Tag Developers Guide |
| --- |
| |
| # Selecting Themes |
| |
| 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](form-tag.html) 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.xml` (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](ajax-theme.html) 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.xml`. |
