Enrolment

It is as Emma says -you are looking at Site administration. You need to go into a course, click the gear menu top right and then the More link. Another way is to click Participants in the navigation drawer on the left, and then click the gear/cogwheel icon there -that also takes you to Enrolment methods. Here is a video made for a course we did. It shows the second way to get to Enrolment methods. But you have to be inside a course to be able to get there.