The navigation is created dynamically and displays the pages you have created in the admin panel.
Open header.php and look for:
<ul class="sf-menu">
<li class="<?php echo $indexpage_class; ?>"><a href="<?php echo get_settings('home'); ?>"><?php echo $dfblog_home_label ?></a></li>
<?php wp_list_pages('sort_column=menu_order&title_li='); /* old -> wp_list_pages('title_li=&depth=1'); */ ?>
<?php if ($dfblog_feed_visibility == "on") { ?>
<li class="page_item"><a href="<?php bloginfo('rss2_url'); ?>" title="<?php bloginfo('name'); ?> RSS Feed"><?php _e('Subscribe to Feed'); ?></a></li>
<?php } ?>
<li class="page_last">?</li>
</ul>
The code inbetween the first <li> </li> tags is what outputs the pages as menus. The Second <li> </li> tags output the Subscribe to RSS Menu
You could hardcode a menu before, in between or after any of the above <li> </li> tags or you could delete them entirely and manually add the menu’s yourself. Just make sure you remove the opening and closing <li><!-- and everything in between --></li>
ie if you wanted to manually add links to the homepage and blog:
<li><a href="https://yourwebsitename.com">Home</a></li>
<li><a href="https://yourwebsitename.com/blog">Blog</a></li>
