User menu
From MoodleDocs
The user menu can be accessed by clicking on the small triangle next to your user name at the top right of the Dashboard, the home page, or most other pages in your Moodle site.
When you click on the small triangle next to your user name, a dropdown menu will show links to your dashboard, profile, grades, messages and your preferences. There will also be a link to log out of the site, and (if you are a teacher or admin) there may be a link that allows you to Switch your role