@item help-echo
@kindex help-echo @r{(text property)}
+@cindex tooltip
@anchor{Text help-echo}
If text has a string as its @code{help-echo} property, then when you
move the mouse onto that text, Emacs displays that string in the echo
-area, or in the tooltip window.
+area, or in the tooltip window (@pxref{Tooltips,,, emacs, The GNU Emacs
+Manual}).
If the value of the @code{help-echo} property is a function, that
function is called with three arguments, @var{window}, @var{object} and