4. Add-Drop page is the form on which you separately indicate all the 'added' or 'dropped' courses into/from your SU course list and Learning Agreement. If you make any changes on your course list, in addition to the online add-drop system, you should prepare that document.
6. NO! Please note that when the online add-drop system closes on the announced date and time you CAN NOT do any changes on your course list from then on. The Add-Drop Form stands for an internationally-recognized official document which displays your course changes during your Exchange period.