How to set up Flyout Drop Down menu in Etube ghost theme?

Use the following code in your menu HTML,

<li><a href="#">Home</a><span class="arrow"></span>
    <ul class="dm-align-2 mega-list">
        <li><a href="/">Home One</a></li>
        <li><a href="/home-v2/">Home Two</a></li>
        <li><a href="/home-v3">Home Three</a></li>
        <li><a href="/home-v4">Home Four</a></li>
    </ul>
</li>