Our main navigation row below the header includes a green + button that includes primary functions to create new content (new documents, sites, audits, etc.) or to have quick access to something that was recently opened by you.
Clicking or hovering over the the plus sign shows you this pop-up view:
The links in the Create a New section will only appear based on user rights/permissions. If you have the permissions to Add a new Document for instance, you will see this link option. Clicking on it will open a new tab to execute task. If you don't see an option here you are used to being able to create, then please check your permissions.
The Recently Viewed Items list is a simple way to track back to one of the last 5 items you viewed. The selected item will open in a new tab for you unless it has been deleted or your permissions revoked for some reason.