Info Catalog elisp: Display elisp: Forcing Redisplay

elisp: Refresh Screen

 
 37.1 Refreshing the Screen
 ==========================
 
 The function ‘redraw-frame’ clears and redisplays the entire contents of
 a given frame (Frames).  This is useful if the screen is
 corrupted.
 
  -- Function: redraw-frame &optional frame
      This function clears and redisplays frame FRAME.  If FRAME is
      omitted or nil, it redraws the selected frame.
 
    Even more powerful is ‘redraw-display’:
 
  -- Command: redraw-display
      This function clears and redisplays all visible frames.
 
    In Emacs, processing user input takes priority over redisplay.  If
 you call these functions when input is available, they don’t redisplay
 immediately, but the requested redisplay does happen eventually—after
 all the input has been processed.
 
    On text terminals, suspending and resuming Emacs normally also
 refreshes the screen.  Some terminal emulators record separate contents
 for display-oriented programs such as Emacs and for ordinary sequential
 display.  If you are using such a terminal, you might want to inhibit
 the redisplay on resumption.
 
  -- User Option: no-redraw-on-reenter
      This variable controls whether Emacs redraws the entire screen
      after it has been suspended and resumed.  Non-‘nil’ means there is
      no need to redraw, ‘nil’ means redrawing is needed.  The default is
      ‘nil’.
 

Info Catalog elisp: Display elisp: Forcing Redisplay