Info Catalog efaq: Displaying the current line or column efaq: Common requests efaq: Turning on abbrevs by default

efaq: Displaying the current file name in the titlebar

 
 5.6 How can I modify the titlebar to contain the current file name?
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 The contents of an Emacs frame’s titlebar is controlled by the variable
 ‘frame-title-format’, which has the same structure as the variable
 ‘mode-line-format’.  (Use ‘C-h v’ or ‘M-x describe-variable’ to get
 information about one or both of these variables.)
 
    By default, the titlebar for a frame does contain the name of the
 buffer currently being visited, except if there is a single frame.  In
 such a case, the titlebar contains Emacs invocation name and the name of
 the machine at which Emacs was invoked.  This is done by setting
 ‘frame-title-format’ to the default value of
 
      (multiple-frames "%b" ("" invocation-name "@" (system-name)))
 
    To modify the behavior such that frame titlebars contain the buffer’s
 name regardless of the number of existing frames, include the following
 in your ‘.emacs’:
 
      (setq frame-title-format "%b")
 

Info Catalog efaq: Displaying the current line or column efaq: Common requests efaq: Turning on abbrevs by default