This is possible for open offer registrations and for programs with self-management.
Reservations can be done directly in the training card of the user's Hompgage, or using the detail-overview of the exam course itself.
They both show the blue button "Plan your exam" or "Plan your retake" which will give the overview of all (sub)modules to be taken. It will allow the participant to make a reservation for each of them.
Remark: when you are not using real time credits when enrolling, this participant's reservation will only be final when its payment has been registered, until then the participant gets to see the 'waiting for payment' status.