how to open one html page in two different ways code example

Example: html add page to document

<nav>
  <ul>
    <li><a href="myPage.html">Main Page</a></li> <!-- Add a link to a website. -->
    <li><a href="myOtherPage.html">Other Page</a></li> <!-- Add a link to another website. -->
  </ul>
</nav>