<schemalist>
  <schema gettext-domain="evolution" id="org.gnome.evolution.text-highlight" path="/org/gnome/evolution/text-highlight/">
    <key name="theme" type="s">
      <default>''</default>
      <_summary>Theme name to use, defaults to “bclear”</_summary>
      <_description>Use “highlight --list-scripts=themes” to get the list of installed themes and then the value to one of them. The change requires only re-format of the message part to take into effect, like using right-click→Format As→....</_description>
    </key>
  </schema>
</schemalist>