emacs: Minibuffer

 
 8 The Minibuffer
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 The “minibuffer” is where Emacs commands read complicated arguments,
 such as file names, buffer names, Emacs command names, or Lisp
 expressions.  We call it the “minibuffer” because it’s a special-purpose
 buffer with a small amount of screen space.  You can use the usual Emacs
 editing commands in the minibuffer to edit the argument text.
 

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