So that people can register new sites on your network, you'll need to provide access to a signup page. WordPress automatically creates a signup page for you at http://yoursite.com/wp-signup.php. This isn't a very easy URL to remember, so we'll add it to your main site's menu to allow easy access:
Access your main site by clicking on My Sites and then its name by clicking on the create a new menu link.
Go to Appearance | Menus.
If you don't already have a menu, you'll need to create a new one. Type a name for your menu in the Menu Name field and click on the Create Menu button.
Add some of your site's content to your menu if you have it—the pages in your site and a link to your home page.
On the left-hand side, click on the Links option.
In the URL field, type
http://yoursite.com/wp-signup.php, replacingyoursite.comwith your site's domain name.In the Link Text field, type
Sign Up.Click on the Add to Menu button.
Now, move the new link within your menu so that it's in the position...