This is what our toolbar looks like:

The toolbar includes the general functions of the course, as defined below. (Some of those functions may not be relevant for this course.)
Course: Here, you will find the chapter contents. Click on this icon to return to the contents after having visited the discussion forum, for example.
News: Here's where you will find messages from the organiser of the course. Any posts made by the organiser here, will be automatically also delivered by email.
Course participants: Here, you'll find the community of the course.
General discussion forum: This is where discussions between you and the other course participants can take place.
Social Media: In this section, some courses offer related social media channels.
Badges and Certificates: If applicable to this course, this is where you can find badges and awards for the course.