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15.2 Online Help of Command Line
(1) In any view, enter <?> to obtain all the commands in this view and their brief descriptions.
(2) Enter a command, followed by "?" separated by a space. If there is a keyword at the location of
this command line, list all the keywords and their brief descriptions.
(3) Enter a string, immediately followed by <?>. List all the commands that begin with this string.
(4) Enter the first few letters of one keyword of the command and then press <Tab>. If the
keyword that begins with the entered letters is unique, the complete keyword can be displayed.
←Press <Tab> key