Info Catalog elisp: Character Display elisp: Display elisp: Window Systems

elisp: Beeping

 
 37.23 Beeping
 =============
 
 This section describes how to make Emacs ring the bell (or blink the
 screen) to attract the user’s attention.  Be conservative about how
 often you do this; frequent bells can become irritating.  Also be
 careful not to use just beeping when signaling an error is more
 appropriate (Errors).
 
  -- Function: ding &optional do-not-terminate
      This function beeps, or flashes the screen (see ‘visible-bell’
      below).  It also terminates any keyboard macro currently executing
      unless DO-NOT-TERMINATE is non-‘nil’.
 
  -- Function: beep &optional do-not-terminate
      This is a synonym for ‘ding’.
 
  -- User Option: visible-bell
      This variable determines whether Emacs should flash the screen to
      represent a bell.  Non-‘nil’ means yes, ‘nil’ means no.  This is
      effective on graphical displays, and on text terminals provided the
      terminal’s Termcap entry defines the visible bell capability
      (‘vb’).
 
  -- User Option: ring-bell-function
      If this is non-‘nil’, it specifies how Emacs should ring the bell.
      Its value should be a function of no arguments.  If this is
      non-‘nil’, it takes precedence over the ‘visible-bell’ variable.
 

Info Catalog elisp: Character Display elisp: Display elisp: Window Systems