Applying a theme to a page replaces the current theme on a page-by-page basis. Changing the theme already applied to one or more pages can be performed on a theme-by-theme basis by replacing an applied theme.
In the Web Site drawer, click the Site Pages tab.
Click the navigation button of the page to which you want to change the theme. The selected page is displayed.
Click Page > Theme. A new window displays the Select Theme screen.
Click the radio button next to the desired theme.
To see a full-size version of your selection, including buttons, click Preview .
Click Apply.
The Select Theme screen closes and the page is displayed with the new theme.
Click Save.