Both the past and future registered exams are listed both by clicking the Taken exams link on the exams overview screen and by directly selecting Exams/Taken exams menu item. The displayed data are the same as the ones on the exam registration screen.
Drop, details
You can deregister from future exams with the Drop function found at the end of the row.
The Details link navigates to the screen presenting the detailed information of the exam, where further options related to the exams are available too, e.g. switch exam date, online occasions or the completion of practice and exam sheets in case of an electronic exam.
