1
Edit your menu. There are two ways to get there:
From the admin area's menu bar on the left.
Click edit menu links at the top of any webpage.
2
The different items you can add to the menu are in the left column and you should see all your current menu links on the right.
If adding a web page find the page section select it then click the add to menu button.
3
The page will be added to the bottom of the menu on the right. Drag and drop it to place it where you want it on the menu.
To make it a sub menu item, drag it under the main menu item then a little to the right to indent it.
Save the menu and it's done.
Add your logo in the admin