Initial situation: If a student is not present at the beginning of the lesson, you will first mark him / her as absent when you check the attendance or absences and confirm them in the digital class register.
If a student joins the class due to a delay, click again on the relevant subject in the timetable and then on the Confirmed Absences:
Operate the gray slider that represents the student's absence. The following window opens:
Here you can specify the time at which the person appeared in class.
In the list of attendances and absences, the student then appears under those present, but is marked as "late".