You can easily manage your site menus, including moving them around, changing the links or editing description texts.
Go to Pages and Menus in your admin menu which loads Your Website Organisation with your pages and menu links.
Please note that your website comes with 2 menus: The Top Menu which shows up above the header, at the very top of your website. The Main Menu shows up underneath the Header and above the Content section. Usually, the Main Menu is the most used menu style for the common links and the (mostly smaller) Top Menu for Sign Ins, Contact Links or external links. (But of course there are no limitations in terms of creativity!)
To add a page to a menu, click on the page icon under Website Pages and then To Top / To Main depending if you wish to add that particular page to your top or main menu.
You can also click Add Link on your top/main menu and choose from Select Path which has all your existing pages. If you want to place an external link (to another website) enter the URL (where the link goes to, http://www....) Fill in the other fields with Menu Text being the words displayed on the menu and Description Text the text that can be displayed when hovering over the menu item. This you can choose by clicking the appropriate box as well as Open link in a new window. You can also choose a limited access for certain pages, e.g. to site administrators or editors only. In that case normal user will not see that link unless they have the required sign in.
You can move your menu links and change their position by clicking on one you wish to move and then use the blue arrows that show the available moving options. You can create submenus which means that a menu link will be underneath another one and appear as a drop down menu. To do that use the 45 degree angle arrows.
You can delete a menu link from the menu by clicking on that link and then delete. Please note that deleting a link from a menu does not delete the page automatically which has to be done under Website Pages.