Following the structure of Microsoft® Office, all functionaliy is available via the tabs in the ribbon.
Tthe Home tab reflects the most common functionality while the other tabs offer the possibility to configure multiple layouts, set background images, configure encoding and customize the view among other options.
It is also possible to minimize the ribbon if you need more space on your design because you are using a smaller screen.
Right mouse click on one of the available tabs to open the context menu and select Minimize the Ribbon.
Now you only see the headers of the tabs and more space is offered. Clicking on the tab will have the Ribbon information expand. After selecting the functionality it will close again.
To restore the Ribbon, simple right mouse click on one of the tabs and deselect Minimize the Ribbon from the context menu.