Howto use wp_nav_menu ?

Hello,

I am trying to use the wp_nav_menu for a new theme but can’t get a clue on how it works.

My menu should be something like :

• MENU1

• submenu1.1
• submenu1.2

• MENU2

• submenu2.1
• submenu2.2

I have activated it in the functions.php : add_theme_support( 'nav-menus' );

I then put <?php wp_nav_menu(); ?> in my header.php.

So far I just have :

• submenu1.1
• submenu1.2

How to use this function ?

Best regards,
arnaud.