title: Multi-image billboard in WiX bootstrapper themes
body: <p>I’m trying to incorporate a billboard element in a WiX theme in order to show the software’s features in a set of images.
  What I’m currently using is the <a href="https://wixtoolset.org/documentation/manual/v3/xsd/thmutil/billboard.html" rel="nofollow noreferrer">billboard(thmutil)</a> element but the documentation is kinda confusing, it says</p>
  <blockquote>
  <p>Children:</p>
  <p>Sequence (min: 1, max: 1)</p>
  <ol>
  <li>Image (min: 1, max: 1)</li>
  </ol>
  </blockquote>
  <p>Apparently this billboard element only allows a single <code>&lt;Image /&gt;</code> element in it (my IDE also suggested the same), then how can I insert multiple images in this billboard element?</p>