The top-left corner of the screen is the application logo. The logo overlaps the navigation bar a little, for aesthetic reasons and to make it fit in better with the rest of the page. 

At the top-right corner of the screen is the user options. This where it tells you the user name that you are logged-in with, provides a link where you can log-out, in order to switch users. It also shows you the language options that are available, if additional languages are installed. If search is enabled you will also see the search box here. 

Underneath that area is the byline or description for the application.