Menu: customize site navigation
Menus are a collection of links (menu items) used to navigate a website. The menu module provides an interface to control and customize the powerful menu system that comes with Drupal. Menus are primarily displayed as a hierarchical list of links using Drupal's highly flexible blocks feature. Each menu automatically creates a block of the same name. By default, new menu items are placed inside a built-in menu labeled Navigation, but administrators can also create custom menus.
Drupal themes generally provide out-of-the-box support for two menus commonly labeled primary links and secondary links. These are sets of links which are usually displayed in the header or footer of each page (depending on the currently active theme). Any menu can be designated as the primary or secondary links menu via the menu settings page.
Menu administration tabs:
- On the administer menu page, administrators can "edit" to change the title, description, parent or weight of a menu item. Under the "operations" column, click on "enable/disable" to toggle a menu item on or off. Only menu items which are enabled are displayed in the corresponding menu block. Note that the default menu items generated by the menu module cannot be deleted, only disabled.
- Use the "add menu" tab to submit a title for a new custom menu. Once submitted, the menu will appear in a list toward the bottom of the administer menu page underneath the main navigation menu. Under the menu name there will be links to edit or delete the menu, and a link to add new items to the menu.
- Use the "add menu item" tab to create new links in either the navigation or a custom menu (such as a primary/secondary links menu). Select the parent item to place the new link within an existing menu structure. For top level menu items, choose the name of the menu in which the link is to be added.
You can
- administer menus at administer >> menus.
- add a menu at administer >> menus.
- add a menu item at administer >> menus >> add menu item.
- modify menu settings (in particular, to specify a menu to use for primary or secondary links) at administer >> settings >> menus.
- manage menu blocks at administer >> blocks.

Ehm... translation of menus??? ....languages???
".....and customize the powerful menu system that comes with Drupal"
Right.... and how about languages handling for menus?
I understood D6 was supposed to be multi-language specific, so I decided to port my site from D5 to D6. Not the official way, because after 2 years of struggling, based on trial and error, I have hardly advanced. So I simply created a new site under a temporary domain with the intention to start from scratch and just copy and paste the contents.
But I after installing and all, I got stuck right away, wanting to do no more than copying a first page in 4 languages, to corresponding menus in 4 languages, but...... NO language switch under admin/build/menu.....
At first instance I thought the problem was mine, because "The Internationalization package has been fully reworked to work seamlessly with Drupal 6 multilingual features." I have spent hours trying to get the configuration right until the many issues on this subject made it clear that multi-language just doesn't go with the menus in D6.
WHAT? No language handling for the fundamental element of a multi-lingual website?? What's the sense of the rest then?? I don't understand why something essential and nicely working in D5 has been removed in D6.
I imagine (hope) that a year after http://drupal.org/node/244752 and http://drupal.org/node/208047 some understandable solution must have come up, but I am not able to find it. Should I stick to D5 or, better still, go back to ordinary HTML?
(by the way, didn't mean this to be bold...¿?)