First navigate to the subject tree under the menu item "Exam registration", as described under Exam registration. Now select the subject for which you would like to withdraw your exam registration. To do this, click on "Cancel exam registration" next to the name of the exam.

Please check again whether you really want to deregister from this exam. Then please click on "Yes".

After you have canceled your registration for the exam, the table shows the process “Withdraw” for the respective exam. This completes the deregistration for this exam.