<configure
    xmlns="http://namespaces.zope.org/zope"
    xmlns:browser="http://namespaces.zope.org/browser">

    <interface 
      interface=".interfaces.IMyTheme" 
      type="zope.publisher.interfaces.browser.IBrowserSkinType"
      name="My Theme"
      />
      
    <browser:page
        name="layer-test-view"
        for="*"
        template="default.pt"
        permission="zope2.View"
        />
    
    <browser:page
        name="layer-test-view"
        for="*"
        layer=".interfaces.IMyTheme"
        template="mytheme.pt"
        permission="zope2.View"
        />
    
</configure>
