Registering a trainee for a session will allow that trainee to attend the session. Only trainees with active lesson schedules for the lesson associated with the session can attend the session. In order to create a lesson schedule for a user, follow this article.
Trainees can register themselves for a session, however, administrator users can also register trainees for any sessions, and instructor users can register trainees for any session they instruct.
To do this, first, go to the lessons tab and select the session for which you would like to register the trainee. When the session is selected you will be taken to a page that looks like this:
Select the attendees' tab at the top which will bring you to this page:
This page lists all the attendees of the session. As you can see, at the moment there are no attendees. To add attendees select the add button just below the attendees' tab. This should show you the following popup:
This popup will list all users in the system that have an active schedule for the lesson associated with the session. It will exclude any users already registered for this session. By selecting users in the list they will appear in the selection box, as shown below:
When you have finished selecting users select save. When the save finishes, the list on the screen should be update with the new users:
By default, these users will receive an email informing them that they have been signed up for a session. This can be disabled in the notifications settings for the account.