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 (see Errors).
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.
This is a synonym for ding.
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’).
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.