As for this problem, the most probable and the most likely answer for this one would be DELETE.
One way to delete a note is to tap or click immediately to the left of the note reference mark in the document text and then press the delete key twice. Other keys exhibit the same results when used differently and some do not exhibit as expected. This solely depends as to when it was used or as to what it was used for. Usually there are shortcuts and other things that complicate the usage of keys, but they sure pave way for us users to be more comfortable at our own pace.
Answer: Mr. Frank is the leader of his family and the leader of the entire group in the attic. He arrives first to establish this role. Mrs. Frank and Margot are happy to follow Mr. Frank's lead. Anne is given a dramatic entrance—her mother calls for her and she bounds onto the stage—so that the audience can give the lead character a round applause.