How to customize the Navigation menu

Find the following code:

<div id='navigation-wrapper'><ul id='navigation'><li><a Title='Home' expr:href='data:blog.homepageUrl'>Home</a></li> <li><a Title='About' href='#'>About</a></li> <li><a Title='Contact' href='#'>Contact</a></li> </ul></div>

You will notice that each item of the HTML list is a different button in your menu. Customize them as you would like. Just leave the "Home" as it is, It's already set to automatically link the homepage of your blog.