You can choose the headers while creating your Pages. Simply follow the structure below to create the header:
<!-- Start Header -->
<header id="top-navbar" class="top-navbar">
<div class="container">
<div class="top-navbar_full">
<div class="back-btn">
....
</div>
<div class="top-navbar-title">
....
</div>
<div class="skip-btn-goal">
....
</div>
</div>
</div>
</header>
<!-- End Header -->
If you want to edit the menu from the bottom navigation menu, for that you have to visit the home-page there you can easily find out the code for the bottom navigation menu. You may also discover the bottom navigation menu in Homepage, Bookmark, Course ongoing Screen and many more respectively.
<!-- Bootom TabBar Structure -->
<div class="home-navigation-menu">
<div class="bottom-panel nagivation-menu-wrap">
<ul class="bootom-tabbar">
<li class="active">
<a>
....
</a>
</li>
<li class="">
<a>
....
</a>
</li>
</ul>
</div>
</div>