This dropdown allows you to temporarily switch to another role so that you can see what the course would look like to someone with that role. The roles are the same as those you are allowed to assign to people. When you've finished navigating around the course, you can return to your normal role using the button on the course page or the link at the top of any page.

Note: to thoroughly test a course, it's a good idea to create a test student account. Contact support@educadium for a step guide.