ffap-highlight

ffap-highlight is a compiled Lisp function in `ffap.el'.

(ffap-highlight &optional REMOVE)

If `ffap-highlight' is set, highlight the guess in this buffer.
That is, the last buffer substring found by `ffap-string-at-point'.
Optional argument REMOVE means to remove any such highlighting.
Uses the face `ffap' if it is defined, or else `highlight'.