the mouse or a key like @kbd{RET}, it often has associated help text.
Areas of the mode line are examples. On most window systems, the help
text is displayed as a ``tooltip'' (sometimes known as ``balloon
-help''). @xref{Tooltips}. Otherwise, it is shown in the echo area
-when you move point into the active text.
+help''), when you move the mouse over the active text. @xref{Tooltips}.
+On some systems, it is shown in the echo area. On text-only
+terminals, Emacs may not be able to follow the mouse and hence will
+not show the help text on mouse-over.
@kindex C-h .
@findex display-local-help