Navbar customisation

Hi all,

Im still very very new to wordpress and I have installed a theme but I’m trying to add a permanent link to the homepage on the navbar because the navbar only shows the pages added. I have found where I think it needs to go but have tried a few things and nothing seems to work.

I think it needs to go into this part of code but cant think how

<div id="navbar">

        <?php wp_nav_menu('title_li=&depth=2&menu_class=menu'); ?> 

    </div>

Hope someone can help this novice – thanks in advance