ido: All Matching

 
 6.1 All Matching
 ================
 
 If you have many matching files, they may not all fit onto one line of
 the minibuffer.  Normally, the minibuffer window will grow to show you
 more of the matching files (depending on the value of the variables
 ‘resize-mini-windows’ and ‘max-mini-window-height’).  If you want Ido to
 behave differently from the default minibuffer resizing behavior, set
 the variable ‘ido-max-window-height’.
 
    Also, to improve the responsiveness of Ido, the maximum number of
 matching items is limited to 12, but you can increase or removed this
 limit via the ‘ido-max-prospects’ user option.
 
    To see a full list of all matching buffers in a separate buffer, hit
 ‘?’ or press <TAB> when there are no further completions to the
 substring.  Repeated <TAB> presses will scroll you through this separate
 buffer.