Variable: overlay-arrow-string
overlay-arrow-string is a variable defined in xdisp.c.
Value
"=>"
Documentation
String to display as an arrow in text-mode frames.
See also overlay-arrow-position.
Probably introduced at or before Emacs version 18.50.
Source Code
// Defined in /usr/src/emacs/src/xdisp.c
DEFVAR_LISP ("overlay-arrow-string", Voverlay_arrow_string,
doc: /* String to display as an arrow in text-mode frames.
See also `overlay-arrow-position'. */);