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 webwork.ui.theme property in webwork.properties (defaults to xhtml)

A few important concepts come from this order:

• You can override an entire form's theme by only changing the theme attribute for the forum. This makes it easy to use the ajax theme in just a few select places.
• You can change the theme for a user's session. This might be useful if users can customize their look and feel.
• If you want to change the theme for the entire application, adjust your webwork.properties.