You can create a new window by keying in Ctrl + b followed by c. You can now see that we have two panes at the bottom of the screen:

Windows are automatically named based on what process is running in an active window within a pane. You can rename the current window by running Ctrl + b followed by ,:

You can navigate the windows by pressing Ctrl + b followed by n to go forward and Ctrl + b followed by p to go backward.