Once the session's date has been reached, administrators can begin to mark attendance of the session, indicating which of the registered have attended. To begin doing so, first open the Events tool (found under the Communication suite), click the name of the relevant event, and then click the View icon against the session which you would like to mark the attendance of.
You will be presented with the Session Details page, which now includes a Mark Attendance button. Click this button, and you will be returned a similar page, except the Attended column is now populated with crosses and ticks. Simply click the tick button for those that have attended the session, and the cross for those that had not appeared.
After that, press the Save button to save the record of attendance.