Use the -pack flag to renumber the messages in a folder. Displays a line of information about each folder in your mail directory. Displays only the names of the folders. Displays column headings for the folder information. Displays the current folder followed by the contents of the folder stack.
Message Sets the specified message as the current message.
This is the default. The new message that is created. Displays information about each folder. This flag is the default. Suppresses column headings for the folder information.