(ddd.info)Command History

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Enter node , (file) or (file)node

10.1.2 Command History
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You can _repeat_ previous and next commands by pressing the <Up> and
<Down> arrow keys, respectively.  This presents you previous and later
commands on the command line; use <Return> to apply the current command.

   If you enter an empty line (just use <Return> at the debugger
prompt), the last command is repeated as well.

   `Commands => Command History' shows the command history.

   You can _search_ for previous commands by pressing <Ctrl+B>.  This
invokes _incremental search mode,_ where you can enter a string to be
searched in previous commands.  Press <Ctrl+B> again to repeat the
search, or <Ctrl+F> to search in the reverse direction.  To return to
normal mode, press <ESC>, or use any cursor command.

   The command history is automatically saved when exiting DDD.  You
can turn off this feature by setting the following resource to `off':

 -- Resource: saveHistoryOnExit (class SaveOnExit)
     If `on' (default), the command history is automatically saved when
     DDD exits.