Now, remember this:

In Circle Focus mode, one circle is set in focus.
In Project Focus mode, one project is set in focus. 

There are two more view modes that provides further oversight: they are called Circle Mode and Project Mode. These modes replace the standard view of the 7 lists, with a view of all circles you have created (Circle Mode) or all projects you have created (Project Mode).

This will look like this:

Find out more by watching this video on the Circle Mode and the Project Mode:

Read more in this knowledge base article.