If you see a piece of information that you do not want to remember, or you are sure that you will remember anyway (i.e. without SuperMemo), press Ctrl+D
Press Ctrl+D now to never see this page again while making repetitions
Hint: You do not have to worry that you will forget the Ctrl+D shortcut because of pressing Ctrl+D now. You have already memorized a similar page (earlier in this course)